A'n'L

The petition and check must arrive together, so most people send the petition documents to a trustworthy friend or family member in the US, who adds the check and sends the whole package.

Yes, you need to take the two copies to the county clerk. You can get a certified copy of the filed certificate from them (with a seal), that is what you need to file i130.

Yes, the licence (top 3/4 of the page) becomes a certificate once you've had your marriage ceremony and the bottom is filled in and signed. You also need to file it to get a certified copy to use for official purposes (such as immigration).

Yes, the licence (top 3/4 of the page) becomes a certificate once you've had your marriage ceremony and the bottom is filled in and signed. You also need to file it to get a certified copy to use for official purposes (such as immigration).

Yes, the licence (top 3/4 of the page) becomes a certificate once you've had your marriage ceremony and the bottom is filled in and signed. You also need to file it to get a certified copy to use for official purposes (such as immigration).

Does he have employment letter, paystubs, is he filing taxes? Current income is most important, but he needs proof.

The full truth and nothing else. If she lies about having/visiting  a US husband, that will come back to haunt her when interviewing for her immigrant visa. She may then be denied for previous misrepresentation.

The full truth and nothing else. If she lies about having/visiting  a US husband, that will come back to haunt her when interviewing for her immigrant visa. She may then be denied for previous misrepresentation.

This is correct. I can be hard for ESTA eligible VWP citizens to obtain a visitors visa, because it shows intent to stay in the US for a long time. 

More like 1-2 months from cc to interview.

No. She should say she's visiting her fiancé. Never offer more than what is asked. Most likely they will not ask anything beyond that, but if they do - she can offer the evidence.

1) No, that's fine. You've been out of status since 90 days after your K1 entry, but that will no longer be an issue once the AOS process has started. 
2) Anywhere between 4 months to over a year. Depends on your local office case load and if you even get chosen for an interview.
3) What about i864 and supporting evidence? G325a? I94 and copy of visa and entry stamp? Copy of passport biographical page? You'll need six passport photos total (two for each application). Make sure you have a copy of your certified marriage certificate, not just the license.

Everybody goes through AP, including security checks. It normally takes days, sometimes weeks, rarely months, and very rarely years. The issue with immigrating from Pakistan is that there does tend to be a longer AP for background checks. The security check process is a black box and there is no expedite for it. I hope you don't have a longer AP and the odds are you won't, but just be aware that it is possible (i.e. don't buy tickets until you have the visa in hand, which applies to anybody coming from anywhere).
 
It's currently taking 12-14 months from filing to approval. Pregnancy is not considered a cause for an expedite (except maybe where there are severe medical complications, but then it's just a normal medical expedite).

First of all, it's illegal/misrepresentation. Second of all, it could possibly complicate your life on so many levels. 

It's a little abstract/irrelevant in your scenario. For a CR1/IR1 immigrant it would mean that, his/her employment situation was the same the last day in their home country and the first day in the US.
 
No, because you would have another US employer - still fulfilling the requirement.
 
I haven't had my coffee yet, not so good at articulating a response ;-)

Correct, with the new i129f form, g325a's are no longer required. It's not going to impact your case if you include it, it's just unnecessary.

No, it's not a problem. They'll just disregard it.

USCIS' target maximum processing time for fiance i129f's is five months. They've generally managed to maintain this deadline the last two years. Prior to that, it could take up to more than a year.

From the i864 instructions:
 
Can the Intending Immigrant Help Me Meet the Income Requirements?
If certain conditions are met, an intending immigrant’s income can help you meet the income requirement. If the
intending immigrant is your spouse, his or her income can be included if it will continue from the same source after he or
she obtains lawful permanent resident status.
 
It does not specify that the income must be US based, so I believe it will qualify. Obviously you will have to prove how the income will continue.
 
 

You can fill it out, but it's her application and she's the one responsible for the accuracy of the data in it. She must be the one to sign and submit it. I'd suggest going over it at the same time as her (along with her signing/submitting it herself).
 
An invitation letter won't help her case. It only gives a reason for visiting (which she can provide at the interview anyway), not for returning home. An invitation letter can actually include implied ties to the US within it, which can hurt the case. The key point is that she needs to show evidence of her need to return home without overstaying, engaging in work within the US, etc.

If her only intention with your marriage was immigration, wouldn't she have left you a long long time ago?
 
As you suggest, there's really nothing you can do about her US status. 

The country as a whole is moving in a decidedly anti-immigrant direction.
 
In some areas this is just a little (or none); in others it's far more overt. This is the culmination of spending the best part of 20 years whipping people up into a frenzy over those damn Muslim terrorists (but forget all those domestic terrorists--overwhelmingly non-Muslims, by the way) and then electing a right-wing president who pandered to alt-right white extremists to help get himself into the White House.
 
No one, not even me, disputes that the current US immigration system is in drastic need of an overhaul; USCIS is an inept federal agency that needs a complete top-to-bottom clean-out, but no one is willing to pay either the political or monetary cost of doing so, even though it would be in almost everyone's best interests.
 
So when I see stupidity like trying to ban immigrants from seven countries who have killed a total of zero people in US domestic attacks between 1975 and 2015--zero--but at the same time exclude Saudi Arabia (15 of the 19 9/11 hijackers were from Saudi Arabia), because presumably... oil?... I cannot believe that the current administration has the nation's legal immigrants' best interests at heart. That's presumably why several federal courts have struck down the ban both times the administration has attempted to enact it.
 
No doubt everyone is familiar with the "First they came" poem by Martin Niemöller. It's done the rounds on various social media platforms for years, but is more relevant today than ever. I feel particular solidarity when someone takes aim at legal immigrants, people who have done everything by the book and in some cases moved heaven and earth to get here. Just because I am not in the crosshairs on that particular occasion doesn't mean that I should not try to speak up or assist those being persecuted... at some point the ire will turn upon staggeringly handsome 30-something tall white men from the West Midlands, and then I'll be in for it. Until then, I view any immigration changes with a highly skeptical eye. The first executive order was a case in point. There is no defending it; it was poorly written, and ambiguous on the status of affected LPRs and immigrant visa holders currently outside the US. The White House essentially had no idea what they were doing and cobbled it together over lunch, or so it appeared. It was rightly stayed by federal courts, as was its successor.
 
Anyway, I'm not waiting until they come for me personally to speak out. Right-wing xenophobia has no place in American society--or any society--and it should be lampooned for the idiocy it is. When politicians on both sides want to get together and make sorely-needed improvements to the country's immigration system then they'll have my support, but Trump's band-aid "solutions" are a nonsense, and will solve exactly 0% of the problem.

I'm sure that was of great comfort to those LPRs and immigrant visa holders stranded outside the US when the first executive order on immigration came into being a couple of months ago.

If her only intention with your marriage was immigration, wouldn't she have left you a long long time ago?
 
As you suggest, there's really nothing you can do about her US status. 

If her only intention with your marriage was immigration, wouldn't she have left you a long long time ago?
 
As you suggest, there's really nothing you can do about her US status.