The Goldmans – $13.7B
The Goldmans might have a ginormous empire, but they started from the bottom. Sol Goldman was born to a grocer during the early 1900s. He decided to go into real estate when the Great Depression hit. He earned money on various foreclosed properties by buying dirt-cheap and waiting until the end of The Depression. It was a smart move. After partnering with Alex DiLorenzo, they managed to buy more than 600 buildings over the years! Long-term leases proved to be a good source of income for him.

The Goldmans – $13.7B