lizandpat

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 had a great weekend. I went out on Friday with some firefighter buddies of mine. We don't get to go out as often since we work different schedules. It was fun. Saturday I went to megacon which is kind of like Comic-Con, but smaller. I had never been and it was interesting. I will say that while it was fun and very different. I have one major complaint and that there was not enough shame in that room. I am not saying that they should be ashamed, but I saw some things where a little bit more judgement could have been used. Also there were some famous people there that were charging to have your picture taken with them. A deplorable act if you ask me, but nobody does so whatever. There was one actor who I would have been willing to pay to have my picture taken with, but Billy Dee Williams did not have a can of Colt .45 with him. That was not meant to be racist, because I love Billy Dee. Come on he was freaking Lando. That commercial he did for Colt .45 was hilarious and thats how I wanted to remember the moment. But he didn't have a can so he could not get me to part with my ten dollars. Yes I am still bitter about it.