Turns out, they'd have a few decent options in their price range. The real estate brokerage Redfin calculated that Gates’ estimated wealth could purchase all the homes in Boston.* The Kochs could snap up Atlanta, and the Walton family could turn Seattle (or Washington, D.C., or Austin, or San Antonio, or Dallas, or Miami, or Portland) into an estate. (Numbers on the graphic correspond to the cost of purchasing the city's housing stock).