Holy cow dasudaman, you still post here??? I have made a total of like 3 posts since MS1 🙂
OP, once you talk to the clerkship director and find out exactly where you'll be rotating, I'll be happy to give some public transportation/walking advice. The short answer is that public transportation is not so good around Hillcrest, to my knowledge - but the good thing is that there's a lot of housing in the immediate area, so you can likely find a place that's walkable. For Thornton/VA, it's harder to find a place that's walkable, but the public transportation options are better - check ucsdbus.com or sdmts.com.
Also, I can post on the med student forum to ask if anyone's looking for a subletter; there are posts about this all the time.