As a 3year veteran with only class C experience I am asking out of ignorance. If your truck breaks down on the road and must be towed, What becomes of trailer or 5er and all your belongings? Does your roadside assistance take it somewhere? And is it to your liking? Or is it left on the side of the road? And then you rent a vehicle if the repair takes overnight??
If your trailer needs shop repair you have your truck but not your belongings. Maybe you live in the trailer while it is being repaired??
With my C I have only had one chassis repair, immediately after delivery, which really was Winnebago's assembly problem (fuel line connection) and I waited while it was done - Chevy chassis, very reliable, easy to get repaired. Roadside assistance towed it to the Chevy dealer safe and sound.
If I need a shop repair on the coach I would have the same options as a trailer. I would certainly live in the vehicle until my turn came up at the repair shop and just drop it off when they were actually ready to do the work.
I don't see much difference.
My personal opinion on warrantees is no thanks. The one that came with the new vehicle took care of the start-up problem and I did not extend. I am self insured. The only reason I carry roadside assistance is to have access to the tow and repair shop connections so I get help finding services when I need them.
MobileBasset
2014 Itasca Spirit 25B on Chevy Express 3500 chassis
Daisy and Hank the Basset Hounds