Bill Gates: ~ $124 million, Medina, Washington

Once upon a time, Microsoft founder Bill Gates was the richest man in the world and all he wanted to do was make a beautiful home for his family that met all their needs. Presenting to you, the $124 million worth Gates home, built from scratch in Medina, Washington, that is named Xanadu 2.0 (referencing the movie Citizen Kane).

With 66,000 square feet of living area, the home is a massive and insanely extravagant one — home cleaning must certainly be a problem! Plus, it’s filled with high-tech details such as the 60-foot pool with an underwater music system, the 2,500 square foot heath room with a steam and sauna room, spa and a trampoline room, and there is so much more! Few commoners have actually gone into the house, as it was reported that Bill auctions off house tours for charity.