I would have to agree with what the others have said about your predicament. In San Francisco specifically you would be looking closer to the $900-1,000/sqft range, but there are plenty of areas surrounding San Francisco which could potentially fall into that criteria. I would like to know more about your situation (where you would like to live, where your school is, etc) so I can do some searching for you and find out if there is anything that matches your criteria.
Online sources can sometimes be unreliable, but Vanguard Insider (a free service to my clients) is a proprietary system which lets you search the MLS in real time! No more wild goose chases to find the answers you need. If you're interested in gaining access I'm happy to enroll you! Again, this is 100% free to you as I pay the subscription fee to get my clients access. I'm happy to help anyone else looking in San Francisco as well! If you have any other questions regarding real estate please donâ€™t hesitate to reach out. Iâ€™m always happy to be a trusted resource for all things real estate in San Francisco and the Bay Area.
All the best and good luck with your search!
Realtor, Vanguard Properties
-A caring fellow renter.
It's very unlikely that you will be able to find a place in San Francisco that fits your criteria. Marin, which is just north of San Francisco, is cheaper for rentals. Southern Marin, such as Sausalito, Tiburon, Belvedere, and Mill Valley, would be your best options if you are looking to keep your commute time short. But, as a rule of thumb, the further north you go the cheaper it gets.