As a note regarding the disorganization of the admissions committee, I am pretty UCLA is the one of the 5 most applied to med schools with over 17,000ish applicants and is also the most holistic in the nation (look at their MCAT and GPA ranges from 10-25-50-75-90 percentiles) so I think that might be a reason for their perceived disorganization. Also, they released most of their first round acceptances by mid February and are one of the quickest in terms of giving out WL As (have given over 50 in the first 2 days post April 30 deadline) so I think that's a good sign.
As for cost, yeah, that's a big bummer (and the only reason I decommitted from there for two other similarly ranked or slightly worse schools), but with the two choices you have here, I think the extra 180k might be worth it. I am low-SES myself and totally understand this struggle so you do you! If you are low-SES, UCLA has the LDS loan option (a loan that is interest-free during med school and residency), and that can save a lot of money.
As for the residency matching, the main reason people match into the West Coast is because most are Cali residents that want to do residency there (UCLA is a public school so that makes total sense) but if you look closely at the match list, you will see students match in top-tier residencies in the Northeast, midwest, the South (and Texas). So the match list is self-selecting and should not be a concern; you will not be held back when applying for residency!