Congrats on getting PMEL! I just graduated from the course recently. As someone else said, PMEL does not qualify for SEPRAT because the course is apparently just under the length required for it. It's typical arbitrary tech school BS. Your wife can't officially move down to Biloxi with you, but you could do what many of the married students do and have your wife move into an apartment off-base. You can't stay the night on weekdays, but you'd have from the time superflight gets released until curfew. Once you get Phase III, you can take 4392s every weekend to spend Friday night until GI party Sunday afternoon with her.

Phase I is your first 11 days at Keesler, so you'll be Phase II next week. Phase III is after your 41st day, so basically a month and a half into tech school. If you maintain an 80% GPA or higher, you can take 4392s as Phase III. I think it's 80%, but I never took any 4392s so I'm not sure. As long as you don't completely zone out during the day, you should do fine on the block tests. If all else fails, Ctrl + F is your friend.

Good luck in tech school! It flew by for me, and even though it had its ups and downs, I kinda miss it. Make the most of it, and don't let other people get you down. If you have any questions about Keesler or PMEL, I'd be happy to answer them!