Thanks for the advice on the fenders, never thought of those, added to my list. I was considering using the original hitch but I read that it will destroy the rv frame, so it'll be worth it getting an air ride hitch.
I think a couple thousand to get a hitch professionally installed would be reasonable, cause I'd never trust anything I'd install myself to hold a 10,000lb trailer on the highway, so I'm fine with that. I'll likely install some kind of storage compartments later on.
That truck is nice, but $42k is still expensive, and I would like a manual transmission which doesn't seem to come in any already built rv haulers. Thanks for suggesting it, never saw an hdt for sale close to me.