If you ever wondered what the most expensive home would like in the US, we may have a winner. A real estate developeris just finishing up what could very well be the most expensive home ever sold in the country. The house is a 100,000-square-foot mansion in Bel-Air with four pools, a bowling alley, a nightclub, a 30-car garage, a 45-seat IMAX theater, a 5,000-square-foot master bedroom, and a moat. The developer plans on putting the house on the market in the next month or so and the asking price will be a mear $500 million dollars. The current record holder for the biggest real estate deal in the U.S. is a penthouse in Manhattan that sold for $238 million a few years ago. If this sells, it would double that price and be considered the most expensive home ever sold in the country.