If you want to exchange your house :
San Francisco is one of the most touristy spots on the globe and the amount and variation of hotels reflect this. There is a hotel to suit anyone within San Francisco City and many easy to use search engines to find the perfect place for you. Prices and quality vary widely, so read up on previous guest's reviews so you may ascertain a pleasant stay.
You will find some interesting cheap hotels at http://www.usatourist.com
You will find discount coupons on stays in hotels on: http://www.roomsaver.com
To reserve a hotel you may use:
For more upper-crust accommodations, The Hilton San Francisco offers the finest luxurious and the best of locations.
Some addresses of furnished apartments - hotels in San Francisco: