Seriously, I'm not rich and I did quit school. Spent a lot of time reading, though, and when it came time to take a GED test, I ended up in the too 10 percentile of the state. I may have done better, but I didn't take any adult education classes. In less than a year, I was on the deans list.
Genetics and home life help, also. When you come from a large family with near or at genius IQ level, it helps.