That leaves $13 per day to spend, which is tight, but livable if you really want it. Suggestions: bring a cheap bike, so transport costs nothing; make your own lunches; $5 burrito dinners, etc; work from the public library and/or work from coffee shops and spend as little as possible/nothing; go to all the free events (there are lots, and some are free for the first x visitors) - some even feed you for free (saves $5), and give you booze.
And if you do come to SF, I'll stand you one Chicken Shawarma for dinner, because I think moving to SF for the summer when you're 18 is ballsy, so I'll put $8 behind that. (I spent the summer I turned 18 alone working in Scunthorpe, UK - believe me, SF will be better..)
I think you can, if you really want to, and it sounds like he does, so I say: go for it.
You can get a room share for $600. http://sfbay.craigslist.org/sfc/roo/
That leaves $13 per day to spend, which is tight, but livable if you really want it. Suggestions: bring a cheap bike, so transport costs nothing; make your own lunches; $5 burrito dinners, etc; work from the public library and/or work from coffee shops and spend as little as possible/nothing; go to all the free events (there are lots, and some are free for the first x visitors) - some even feed you for free (saves $5), and give you booze.
And if you do come to SF, I'll stand you one Chicken Shawarma for dinner, because I think moving to SF for the summer when you're 18 is ballsy, so I'll put $8 behind that. (I spent the summer I turned 18 alone working in Scunthorpe, UK - believe me, SF will be better..)