I have to add my 2Cents here. Being new to towing a TT last year I was nervous about towing not just backing into sites. I splurged and bought the Voyager wireless system and put it on the back wall of my 27ft TT. The installation is as simple as finding a power supply on the TT, then hanging the rather large monitor on a bracket inside the truck. It cost less than the $1000 that you are being told is the cost of installation of your wired system! Furthermore I like to be able to use it when driving as a rear view mirror alternative. As far as picture quality....its great. For wireless you need to find a system that has the Camera Sync to the Monitor in order to get away from interference! I get Zero interference!