Ready to do it

I think the OP made some very valid points, and I decided not to respond because of the way in which so many have bashed the OP.
Your response is a masterpiece. The only thing that I would add is that people simply can't comprehend what it is like for a foreign fiance to adjust to life in the US. 90 days is not even close to enough time. It can take years. It is one of the reasons I am so against co-sponsors. In fact, I think the US govt should raise the financial stipulation to at least $40k/yr or even $50k/yr for a family of two. I imagine that most people who make less than $25k/year work full time 40 hours/week at a low paying job. This situation is going to cause an extreme amount of stress on a new couple.
If I made the rules.... no co-sponsors, $50k/yr minimum for a family of two, requirement that the couple have known each other at least 2 years, and requirement that they have lived together for at least 90 days (anywhere) before applying for a K-1 visa. Meet all those requirements and the relationship has the ability to stand the test of time. If you don't meet all those requirements the relationship is an uphill battle in my opinion. People just don't seem to be factoring in how brutal life can really be in the US. Bringing in a foreign fiance that does not speak English (as many do, myself included) requires almost 24 hour attention for a few years. It's very similar to tending to a child. If the USC is not willing to do that, the fiance will absolutely eventually become bored to death if the USC does not find things for the foreign fiance to do all day long, everyday.
The OP brought up some good points. There is no reason the K-1 visa couldn't have a 1 year timeframe to marry. After all, who loses if the timeframe was changed from 90 days to 1 year? No one. It's not to see if the couple is compatible together. It's to see if the foreign fiance can accustom to life in the US. Actually there is a group that loses. USC's who make less than $40k/yr. Why? As I mentioned above, all the adjustments the foreign fiance has to overcome to life in the US is done much easier if there isn't a stress on finances as well. Throw everything into a kettle that the foreign fiance has to adapt to and add financial difficulties to the equation and you will very soon have a failed relationship. If the US govt were to allow more time foreign fiances would at least have the opportunity to realize that maybe living overseas in the US with the love of their life who makes $35k/yr really isn't the life they had envisioned. Tough times call for tough measures. Some rules should be changed. The OP threw it out there, many flamed the OP without understanding what he/she was trying to get across, and P & T responded with one of the best posts I have ever read on Visa Journey.

El- I just read all 7 pages. I wish you the best of luck and have no advise as I know nothing of these issues. I did want to mention that through all the posts I found some things that were really refreshing. First, it is obvious that you are very well educated with a good head on your shoulders. Next, I began to dream about my love in Colombia and some of the times we have spent together when you spoke about your husband and his successful business on the Mediterrean. Ah... a nice boat, good music, and good times with the one we love.
You go get the best atty money can buy and get your man here. In the meantime, I don't have any idea of the uphill battle or the timeframe you are looking at to potentially get him here, but go be with him first chance you can. Enjoy a few days on that boat or on the beach and forget about this whole process for at least a few days. You deserve happiness. Human nature says you will talk about this issue and vent the entire time you are there. Make it a point to forget about this issue for at least a few days and just love each other and enjoy those special moments before you have to start thinking about this issue again.
Best of luck

Now you are onto something. Obviously no one is for killing anyone. However, imagine a system without ANY benefits for ANYONE!! Survival of the fittest. Support yourself, if you cannot... it's your own problem. I'm all for an amnesty for 99% of the illegals in the US. The problem is benefits. No one should get them... not illegals and not legal tax paying citizens. I'd be willing to bet the majority of the latino immigrants if offered amnesty would survive just fine in the US. The problem in the US isn't illegals. The problem is the lazy legals unwilling to go work. Some might say, but there just aren't any jobs. I'd be willing to bet if there was no such thing as benefits then people would be singing a different tune. So, yes you are onto something. Survival of the fittest... any race, any color, anyone welcome in the US... open border with no benefits for anyone.
Ah... and the Affadavit of supports are the stupidest thing ever involved in the immigration process. I'm all for anyone who wants to come to the US, so be it. Support yourself though and don't bring down others, which is exactly what an affadivit of support does potentially.

sad to hear this. Very odd situation. I'm assuming your husband has always lived 15 minutes from the Mexico border? If not, did he move there so you guys could be close. How did he continue work. Seems like an awful lot of hoops to jump through... he moves to Tex/Mex border with 2 kids, you move from Europe to Mexico border with 2 kids, he gets a job in this Tex/Mex border town to support the 6 of you (yet not enough to qualify for 125% of poverty level). That is a lot of hoops jumped through and sounds quite costly.
What does he do for a living. I wouldn't give up, it really is as simple as him finding a high enough paying job.
It sounds like you guys have really been exhausting all your efforts searching for a co-sponsor. Frankly, he should have been using all his efforts to find a higher paying job. The reality of finding someone to sponsor a family of 6, assuming the sponsor reads and understands all the documents, is slim to none. I personally wouldn't be a co-sponsor for a family member of even "1" if the situation arose. It's simply too much liablity put on the co-sponsor by the US government. Hopefully that makes you feel better, as the idea of no one sponsoring you shouldn't be taken personally, as 6 is way too much to ask.
His best bet is get a higher paying job.
Best of luck.

Ron Paul gets my vote. He ain't perfect, but there is one commandment I steadfastly agree with... thou shall not kill. He's the closest candidate I've seen to that. Get the heck outta the middle east.

That is an extremely weak prenup. 2 reasons for prenup... extremely rich or totally insecure. I've never really heard of a prenup that didn't involve at least a few hundred thousand dollars. Anything less than that, what is the purpose?
Based on what you have written... $5k for each year married and $200 pocket money??... and he's a teacher.
You make $3,500/month and free housing, have $50k in the bank, and own property? Sounds like maybe it is you, not him, who needs to be doing a prenup. That was a joke, but I think the prenup offered is simply a "I am totally insecure about this relationship, I know it is going to fail, but I will try it anyhow and I am going to offer peanuts to protect my #######.

That is an extremely weak prenup. 2 reasons for prenup... extremely rich or totally insecure. I've never really heard of a prenup that didn't involve at least a few hundred thousand dollars. Anything less than that, what is the purpose?
Based on what you have written... $5k for each year married and $200 pocket money??... and he's a teacher.
You make $3,500/month and free housing, have $50k in the bank, and own property? Sounds like maybe it is you, not him, who needs to be doing a prenup. That was a joke, but I think the prenup offered is simply a "I am totally insecure about this relationship, I know it is going to fail, but I will try it anyhow and I am going to offer peanuts to protect my #######.