I'll throw my hat in the ring. I started an eCommerce enterprise SaaS focused business in high school as a hobby, sold it for $4M at age 21, bought it back for $32k, built it again into a $6M/year revenue (profitable) business, and sold it again in 2012 to Answers.com. All of this was 100% bootstrapped with revenue, no debt, no outside funding. In neither case, round one or round two, did I self-fund it, other than the $32k -- the revenues from the business funded the business, it wasn't me funding anything. Sure, it was a long slog, but worth it.