San Francisco is one of the most expensive city in the US. The Silicon Valley with it’s worldwide known company :Google, Microsoft, Facebook …and it’s new tech companies, “startups ” Attracts many workers specialised in technology.
As new people come to work here with important amount of income, the housing is getting up.
As a student you can do collocations, renting a room in an inhabitant house…
I have chosen to stay in the USA student residency, in nob hill. A good quality place for a not so much high price :$ 975 per month for a shared room (2) with the hallway bathroom. They provide individual rooms and / or private bathroom
they have a big common kitchen with amenities, a dinning room and a gaming area with a bar.
You’ll find as well a laundry, a library …and each day different activities