You should try to do auto mechanics----if you're not doing it already.
The Bay Area has a perfect climate, actually, for people who want to live in vans. A couple of weeks ago, though, it was 106, and an all-time heat record was broken.
I'm sorry you have to put up with that toxic atmosphere. For some reason, I bet you are quite handy, and can make a van into virtually a home.
I wish I could try living out of my car in the winter in NYC. But you can't do that.