Bloomberg Pursuits:  “Art dealer W. Graham Arader specializes in antique maps, books, and prints, and he has a side interest in antique houses. “I own the seventh-oldest house in San Francisco,” he says, “I own the only pristine beaux-arts mansion on Madison Avenue, and I own George Washington’s home in Virginia.” Also in his possession is a 19th century Victorian house in Nyack, N.Y. Arader bought the home, roughly a 40-minute drive from Manhattan, for about $6 million in 2005. “I bought it for the beauty of the house,” he says. “I’m an art dealer. I like things that are beautiful, plus I bought it for my seven children to use on the weekends.”