Owning an RV rental company I can say that I have seen small repairs add up to big dollars. That said anything over $1000 is covered by insurance with our business. So at most the out of pocket would cover the deductable (in our case $1000). There is the issue of being able to charge while it's out of service but I don't see that itemized here. 2 questions; did they have insurance for the rental (MBA?) and if so what did the rental contract say (fine print in the back) should detail a section about repairs and damage, second did you consult your insurance company? Often they will cover damage to a rental vehicle. Not always but it's worth it to check. Although if you already paid them it's likely a moot point now. This sounds like they did the repair in house, never contacting the insurance and fluffling the repair ro make some extra money. I can't be sure but that's what it smells like. I once had a small stone chip in the fiberglass about the size of a penny under the front grill on one of our units. My friend who works at an RV repair shop told me his best price would be $900. And that's a friend. So who knows.
