kwoodruff

Another consideration is the cost of housing, depending on where you are thinking of relocating to in the UK. Admittedly I lived in one of the most expensive areas, SE England. The price of our house in the UK is the equivalent of the price of our house here in the US but we got so much more for our money in the US. Our house in England was a 3 bedroom semi-detached with small front and back garden. Here in the US we have a 4 bedroom, 2 bathroom house on an acre-and-a-half lot. It can be nice to have family support but situations can change and I wouldn't count on grandparents being around or being willing to help with childcare. 
 
For us, being here was the best solution for all of us. James (my husband) would have had to commute to London every day (leave home at 5 a.m., home after 7 p.m. every day) to afford us the same lifestyle we have here. We get space and the country lifestyle we wanted at a fraction of the cost (financial, as well as the impact of not living the commuter lifestyle) and get much more time together as a family than we would have if we'd lived in the UK. You can get more quality time with family if you spend vacations together than if you live geographically close to each other. 
 
You have to weigh up what you value and your priorities. 
 
Thanks for figuring all that out @Trellick. We'd looked in to all this before we chose the K1 route. It's good to have a current picture of immigration to the UK. 
 

after being in US and married 3 years,  apply for citizenship
after naturaliztion ,  make the move back   with your US passports
 
just be sure you file US tax returns (2018 exemption was $104,100 twice that for 2 USC's and also there is a housing allowance of 16% of income ) Form 2555 when you do this for the exemption

If I understand your question correctly, no, having plans to eventually relocate out of the US (in 1 day or 10 years) does not negatively impact your current application.

There is no issues if him/you even if you left a year after GC approval or the next day. The US is not for everyone some leave live in home country and even return later.

Some additional things to consider regarding the citizenship route: 
Applying for naturalization in the US isn't cheap (although usually worth it for people who want to stay here). Once he's a citizen he'll need keep fiing US taxes every year, even when he moves back to the UK.  On the other hand, becoming a US citizen would give your family a lot more flexibility.  Say you move to the UK in 5 years but then find out you don't actually like it there anymore.  If he's a US citizen at that point he can just come back with you.  If he's not you'd need to start the whole visa process all over again. Luckily you don't need to decide that just yet.  You've still got > 3 years before he can apply for naturalization. 

Let's assume he gets his greencard Jan 5, 2020. On Jan 5, 2023 he has reached his eligibility for US citizenship. The application can be mailed off 90 days prior to his eligibility date, but even if processing was super fast he has to get past 1-5-2023 before he could take the oath ceremony. It will not be super fast but should happen sometime during 2023. Once he become a US citizen, he doesn't have to worry about greencard rules because he would be an American and could move anywhere and always return to the US without any immigration process. 
 
Then he could start the process for you to  live in the UK. The biggest hurdle under current law is the financial requirements which do not allow a co-sponsor. He would have to hold a job in the UK for six months earning above a poverty threshold before you could join him. 

It might but he is eligible to apply after 3 years of being a green card holder. Then add maybe a other year until oath. This way he can come and go as he pleases. 
 
See this link to determine eligibility. He needs his green card first though so bookmark it for later reference 
 
https://www.uscis.gov/forms/uscis-early-filing-calculator

Application window opens at three years, then maybe about another year for application to process 

It's 3 years for a spouse. 
 
Have you researched moving to the UK? It's something we have as a plan B for the future but I don't think I'd have the energy or patience to go through it all again in a few years. 

Eligible to apply 3 years after marriage and live in marital union with a US citizen

Not really, especially if he formally surrenders his Greencard once he moves back to the UK.

Yes. You will lose the green card. Since the UK is not high risk country probably he will be able to obtain a tourist visa to visit your family. 
 
Also you need to do ROC if the marriage is less than 2 years old when you have the green card interview.
The only way to be reside as much as you want out of the country is to become a citizen first.
 
There is a form you can fill out before leaving as a GC holder which grants you 1 or 2 years outside of the US without losing your status.
 
Since your plans are around 5 years I would wait out the process to become a citizen before moving back to the UK so he would not have any issues if you decide moving back to USA or want an extended stay. 
 
 

If your plan is 5 years out why not have him get citizenship at 3 years and not worry about surrendering green cards?

Just like Peot mentions, it's case by case basis, I didn't have to show proof of financial hardship but i did explain why i need to expedite for multiple reasons. ALSO you didnt mention if you did your biometrics yet.  I would wait until you have completed your biometrics before you submit an expedite, I believe they can't give you EAD without completing biometrics.
 
1. I made enough above poverty. my income was great when i lived with my parents, but now that i moved out, the bills were piling up and one income wasn't enough.  I also mentioned we live in the suburbs and my husband wasn't able to drive without an EAD or go grocery shopping, etc. it was a very difficult situation, especially in the winter months, he was going crazy sitting at home, he started applying for jobs and got a job offer letter and i used it to expedite.
 
2. I reached out to my congressman office only because calling USCIS was a total fail at the time, you can try it but they weren't even picking up the phone.  The Congressman staff has more power I guess, they asked me to fill out 2-3 papers to email back and I attach the job offer letter for proof of expedite.  They were very willing to help, within 2 weeks, card being produced. got card in mail a week later, so a total of 1 month if they are quick.
 
3. do not say your job is flexible, give them an end date, it will make them work on it quicker.  give them a month from when you submit them.
 
Like i said, i didn't provide proof that i was struggling financially, but i did explain that i bought a condo and I'm paying off the loan and bills, which was a lot on my shoulder, we desperately needed another income to help ease off the stress. I was also paying for wedding party at the same time. but i didn't mention that. but the driving in the suburbs might have helped.....who knows. or maybe the congressman staff that worked on my case was really persuasive. she even called me to tell me how committed she was to get me the work permit. so it's really all luck at the end.

1. It's on a case-by-case basis. You need to prove that if you are without the EAD you would suffer "Severe financial loss to a company or person". This can often be shown in the form of debts, bank account in arrears or overdrawn, if one of you has lost their job or suddenly undertakes a financial burden (medical, funeral, loss not covered by insurance). Having a salaried position, a bank account in the black, and a savings account might be evidence against the urgency, but again it's all subject to interpretation on a case-by-case basis by the USCIS. If they need more evidence, they'll send an RFE.

2. It's not required to speak to your congressman to file the application. Usually when the application for expedition has exceeded 90 days or there's been zero to no correspondence and people get nervous about the status they reach out to their local government. This often happens if the financial loss (or other reason for expedition) is immediate or has already occurred and the application needs to be processed as soon as possible. Many people submit the entire expedition request through their congressman which is an option available to you.
 
3. If you're asking whether or not you should be truthful in your correspondence with the USCIS, you know what the answer will be. The flexible job offer will again be a negative towards proving "financial loss" since the job offer isn't going to disappear without the expedition.
 
4. Though the cover letter mentions there will be a financial burden, a job offer doesn't show this. The burden of proof is on you to show that via bank statements, letters from creditors, invoices, etc. You would still need to provide the job offer, but it's not going to prove your burden very well.
 
 

I also suggest provide a new I-864 at the interview.

Bring new i864 and supporting docs at the interview in that case. No need mail to USCIS before the interview.

Psst... be careful to avoid reviving "zombie" (old) threads or posting twice on the same topic!  

If you notice, I deleted those extraneous things from the list I revised.
It is a tax return transcript. 
Again per the instructions for the form:
 
You must provide either an Internal Revenue Service (IRS) transcript or a photocopy from your own records of your Federal individual income tax return for the most recent tax year. If you believe additional returns may help you to establish your ability to maintain su FYI cient income, you may submit transcripts or photocopies of your Federal individual income tax returns for the three most recent years. 
 
If you provide a photocopy of your Federal individual income tax returns, you must include a copy of each and every Form W-2 and Form 1099 that relates to your returns. Do not include copies of these forms if you provide an IRS transcript of your Federal individual income tax returns rather than a photocopy unless you filed a joint income tax return with your spouse and are qualifying using only your income. 
 
" I have read that the three separate forms...."  Just a point of clarification, it is three separate applications, not forms. The I-864 is just evidence that you will support him. It's not an application for an immigration benefit. It's just part of the evidence like the marriage certificate and other things in the list.
 
My logic says one envelope arrives at the lockbox. The contractors  respond to one G-1145 to let you know everything arrived.  And they look at the one cover letter and say "oh look, she sent 3 application AOS, EAD, AP."  Then they tear it all apart and make 3 folders in their preferred order to pass on to the USCIS departments. My conspiracy theory is that cover letters get thrown out when they put together the standard government file for the departments. I believe that so much so, that I quit doing cover letters completely. And yes it did work out fine for me. Never received one RFE from Fiance petition to US citizenship. Approved on the spot at both interviews. And I didn't over-fill my applications with extraneous stuff for "just in case". 

Either include W-2s and tax returns OR include tax transcripts. Don't send all three, and definitely don't send transcripts and W-2s without 1040s (this just confuses them).
 
I recommend just sending transcripts; it's too easy to accidentally forget a schedule or something with the W-2 + 1040 and all schedules route.

Looks good. Are there more documents that have both your names on it that you can throw in the I-485 such as joint lease, credit cards, bank statements, ... and the like. If you don't have it, you don't have it and it's fine. 

Thank you! You always comment on my (very frequent) posts and I just want to say I appreciate it so much!!!

You could check with local pharmacies to see if they still have some leftover vaccine.  Otherwise, I do not believe it is required to have out of season vaccinations for flu.  I recall a kiwi or an aussie here who didn't have to, as the southern hemisphere flu season is opposite ours.

I do not believe they send RFE/RFIE for medical reasons. What they do, is send "courtesy letters" early on in the process informing you they need either needical full medical (form I-693) or vaccinations. If you do get one of those, the expectations is you will bring those to the interview, so it is not like RFE when you have to send it back, and your application is stalled until you do. 

I know there was no record of a flu shot on our DS-3025, and we send it as is for AoS, and so far we got no RFE or courtesy letters of any kind. But we also do not have interview scheduled either, so who knows.