Would I quit my job? Yes, infact, it'll happen soon anyways. Would I quit school? No, but I would transfer. I currently go to Michigan State University... and I really want to to go to the University of British Columbia - Vancouver... but I can't justify $15k a year in loans, but with 100m, I could make it work.
I would a few million (2-3) to try to get my idea off the ground, it's getting there, but with one person working on it while managing 17 Credits & 25 hours of work a week, It doesn't get very far. With the money, and my free time from not working my job, it would get there quickly.