6Bill Gates
Source:seattle.curbed.com
This 60-year-old billionaire spends most of his time at his home in Medina, Washington, called “Xanadu 2.0” overlooking Lake Washington. The property covers more than 20.000 square meters. Gates took seven years and $63 million to build this house, full of technological devices. He bought it for two million, and now its estimated worth is at $170 million.
