SF is probably the most expensive city in USA to live, but it's really easy to 'get in' if you don't need to settle down...There are a lot of "single occupancy rooms" (SROs) there, they charge 150-250$ per week and you can always find more-or-less decent place to stay for a while. I usually stay for several days in a hostel (closest to the Wharf are Green Turtoise and Fort Mason - hostels.com) and look for an available pay-per-week room (any local paper has #s, or you can ask other buskers on the Wharf)...If you want to rent a room or sublet a flat - a good sourse is craigslist.com, which is SF based community billboard with free ads.If you speak Spanish, Russian, Japaneese or Chineese - check local national papers or web-sites, it's way cheaper to rent a place in an ethnic community...If you need a voice-mail there: bay-link.com - a great deal -10$ for the first month and 3$/month later. And you DO need a voice-mail, if you stay in SRO - there's no private phones there...
