Is this guy living inexpensively? He takes ride-share, which is much more expensive than owning a cheap car. Owning two pairs of clothes doesn't really lower your clothing costs, and my guess is that he doesn't cook much for himself, which is another good way to drive up your cost of living.

Podshare lists rates of $1,000/month in LA (not SF). I don't know what local rents are there, but my guess is that Podshare is below the rates of studio apartments, but at or around the rates of renting one bedroom in a house.