San Francisco has through the roof high rent? Well, why not innovate & live in an RV? An innovative way to overcome the problem of containing personal costs. Also, this is a way to actually own something that can open up some very cool travel possibilities as well.
I'm not saying that it's bad. As a kid I thought of traveling with friends to every ski resort in North America and living out of an RV. I knew a group that actually did just that and I still envy that opportunity. But I've settled down since then and I like having a foundation.
Compared to what you'd get for the same price in SF (e.g. a tiny bedroom in a shared 6 BR house - student-style), it looks like an interesting alternative.
(edit: very hipster / maker indeed - this is from Tynan, one of the guys mentioned in the article http://www.youtube.com/watch?v=BjiQFCunJqk )