Thanks for the replies, everybody! UCLA is offering $23k for the first year so I'd have to pay 10k. Meanwhile WashU is offering $32k so I'd have to pay ~$30k. Rent at UCLA is $1300/month (Weyburn Terrace) whereas rent in St. Louis is less than half (approximately $700 for a nice apartment). Therefore, over 4 years, I figure I'll owe ~$100,000 at UCLA and ~$150,000 at WashU.
I felt like I "fit in" with the students at both school and they both have a pretty similar curriculum. UCLA would be cheaper and yes, I would be closer to friends and family. However, WashU students, on average score much higher on Step 1..idk if it's because WashU teaches to the exam more or because the students are better standardized test takers (their average MCAT is 38 haha). If it's the latter, then I'm not too worried..
As for the clinical training during third year, can anybody comment on whether one is stronger? Reagan and Barnes-Jewish are both incredible hospitals so I would assume they're both top notch..
Lastly, I would love to match into California BUT as a California native who went to college in California, I would like to live somewhere else for 4 years to get a different perspective. However, I don't know if that's worth the extra money...or worth choosing St. Louis over Los Angeles..