1. 1. Bill Gates Worth: $81 billion Home: Medina, Washington
Mr. Gates, 60, spends most of his timeat his 66,000-square-foot Medina, Washington,The mansion overlooks LakeWashington. It took Mr. Gates seven years and $64 million to build thishouse, which is filled with lots of high-tech features. He purchased the lotfor $2 million in 1988, but it's now worth an estimated $171 million, accordingto public records.