There is a big difference between your local Ford dealer and an RV dealer. The Ford dealer gets paid handsomely for warranty work. His duty to provide service is part of the franchise agreement. Your Ford dealer is probably a well respected member of the community. Many( but not all) RV dealers are just one step above "Happy Harry's Used Car Lot". Ford has training programs for the dealer's mechanics. The dealers can get parts in one day. RV mfrs. provide a minimum of support. Very few have decent technical support for the dealers. There are many RV dealers that do not have real techs. Just a guy who was a handyman at his last job. New MH's are a complex piece of equipment and require a trained technician. Hats off to the few who have a great service facility. They do exist but tend to be the exception. Those of us who have found the jewel of service depts. are indeed lucky.
Moisheh