Hi, I don't know if anyone already PM'd you or not, but this is a great idea. There is a homebrew club on the northside of Chicago that has brew space for club members, because the club is in an area of with mostly apartments and space is at a premium. The club is called CHAOS.
If you don't get any response here, try posting in the California regional forum of HBT. You might also try to find a homebrew club locally and see if anyone there is interested in shared space. Good luck!