Welcome to JOF! What kind of camera did you order to replace the Furrion? The hood of the Furrion camera will have two screws holding it, you can unscrew though screw and use the same wiring if it is already their.
You can do it yourself really, I wouldn't let the dealer do it just take the new camera and read on how to install it, it should be only two wire coming out from the top rear.
Do you have this on the back of your rv? If so you can do it yourself it just plug in one wire and install four small screw and you are done.
Tell the dealer no thank you.
https://www.rvtrader.com/listing/201...3RB-5008086425