pgbeau1

As the saying goes, take it from the voice of experience. We filled out the I-129F with whatever was handy, a black or blue pen. Turns out signatures were mixed colors some black some blue.
Upshot was when I sent in the package to USCIS the whole thing came back to me a week later and told me signatures were photocopy not originals (the ones in black) and I had to write a letter saying NO they were originals in black ink. So that cost us about another 12 days in processing and an RFE.
They did accept it when I sent it back with cover letter saying they WERE original black signatures. But it was a 12 day delay in processing our I-129F.
So I learned, use blue ink at least for all signatures, fill out the rest in black is fine, but use BLUE INK for all signatures is my experience.
And for what it's worth we did make it through the interview and approval, and the signatures in black ink on the orginial petition were never questioned again.

As the saying goes, take it from the voice of experience. We filled out the I-129F with whatever was handy, a black or blue pen. Turns out signatures were mixed colors some black some blue.
Upshot was when I sent in the package to USCIS the whole thing came back to me a week later and told me signatures were photocopy not originals (the ones in black) and I had to write a letter saying NO they were originals in black ink. So that cost us about another 12 days in processing and an RFE.
They did accept it when I sent it back with cover letter saying they WERE original black signatures. But it was a 12 day delay in processing our I-129F.
So I learned, use blue ink at least for all signatures, fill out the rest in black is fine, but use BLUE INK for all signatures is my experience.
And for what it's worth we did make it through the interview and approval, and the signatures in black ink on the orginial petition were never questioned again.

First, you are not on a K3 visa path. K3 is dead. Your I-130 will take you down the CR1 visa path.
Only the beneficiary is required to go to Juarez
Because the Consular staff can live in the USA (El Paso, TX) and commute to work every day.
You may choose not to immigrate to the USA. Nobody is requiring you to do so. There are lots of things people find inconvenient, distasteful and even dangerous during the US immigration process all over the world. For example, my wife and daughter live relatively close to the only US Consulate in all of China, that processes family based visas. It was only a 14 hour overnight train ride followed by negotiating the maze of pick-pockets and other scum at the Guangzhou East train station. For some in China it's three full days or more on the train and they need to stay in GUZ for a week or ten days.
It sounds like you are well informed about what's ahead and you have months to make the needed preparations and arrange for any precautions. I suggest you use your energy to that end as the circumstances will not change.

I would apeal that dessition ,
we bought our first home last year in may
when we aplied for the mortgage my GC was still valide for another 10 month,
they didnt even question my status