5. Wally Amos
Millions of people love Famous Amos cookies, but many don’t know that Wally Amos spent most of his career working in a New York City mailroom. Even though he became a music agent and managed stars such as Marvin Gaye and the Supremes, he was still not a millionaire. As he neared retirement, he sought out a way to make some cash while enjoying a hobby he loved: baking. Gaye and Helen Reddy gave him a $25,000 loan to make it happen. His first bakery opened days before he turned 40, and within five years he was making $12 million per year.