Ray, I'm a babe in the woods as far as the nuances, but having experienced a serious fire in our coach I can say that your insurer needs to understand you do not have a conventional RV. You have a very limited number of locations to repair the damage, the repairs will be expensive and will require that you or your repairer buy parts from Prevost, and that not anybody with a tow truck can get the job done.
We were still smoldering when I had National Interstate on the phone, and they gave me a claim number and agreed the coach had to go direct to Prevost for repairs.
Anybody unfamiliar with our conversions is going to struggle with the concept of doing repairs to the original quality level. As far as contents and other coverage I can't offer anything because no personal property was damaged or lost, and despite $82,000 worth of damage in the engine area we lived in it with every single house system working while we loaded the contents in a rental truck. That all despite every battery having melted. There are pictures of it somewhere on this site or the other one.