Jan. 27, 2014 TY WRIGHT, BLOOMBERG According to a survey by HomeAway, an online marketplace for vacation rentals, owners spend an average of 8.6 hours a week managing their properties. Above, a rental home in Huber Heights, Ohio. BY LEW SICHELMAN January 26, 2014, 10:00 p.m. It's one thing to manage a rental house when it's nearby. But it's another process entirely w..