D.R. Horton's president and CEO Don Tomnitz doesn't have a company-issued cell phone. There are no company jets or cars. He doesn't have a fancy office either. Tomnitz calls the largest home builder in the U.S. “a humble company,” and by the same token, he is a humble leader. “It is easy to make money in the home building industry. It is hard to keep it,” says Tomnitz, who has two cell phones that he pays for himself. “If it's your cell phone, you are not going to run over your minutes,” he adds.