Well John McAfee sure knew how to spend money … this whopping 10,000 sq. ft. Mansion sits on 280 acres. He spent in excess of 25 million dollars building it and filled it with Mayan Treasures. After he lost his money he had to sell the place for $5.7 million. The guy who bought it was a young business man from Chicago, however he also could not afford it … so it went back on the market for $3.9 million.