After I checked that the cameras worked in both cars, I asked Hitech Tune to install the rear cameras, the GPS units and tuck all the wiring past airbags and sunroofs. They did a stellar job! Although it's reputed to be easy to install a car camera, it isn't if you have a rear camera and you don't want to risk popping your airbags or affecting your sunroof. They're expensive, but how much would it cost if you'd blown your own airbag attempting it yourself? They even helped me with shuttling the cars. Please note, the cost was for TWO cars, not one!

Approximate cost: $544