I wouldn't take an employee position at a company (startup or no) in the bay area for under $100,000, and it would have to be pretty sweet to get me to accept that. For a startup, it would have to be people I really liked on top of that, because I don't put in 80-hour weeks for money alone.
And if you have parental support, quitting to take a job may well mean that that support never comes back in quite the same way, and finishing school, if you ever do, will be on your dime. And college is a lot more fun when you're 19 and carefree than when you're 30something and wondering if it justifies the tuition.
It's your call, though; this is one of those decisions that has the possibility of being something you later regret no matter which way you decide. Think long and hard.