We now have 2 kayaks. We used a Thule roof rack on my wife's Prius for the 1st but 2 of them seem to compromise the car in lots of ways. I thought I'd put a roof rack cross bar on my Sportage (09) which already has factory-built-in racks. There are several options that range in price from a generic set at $78 to a Yakima set at upwards of $200. Is there a safe, efficient, and economical option that someone is using?