Our first coach was a 38’ gasser class A. That’s about as big as a class comes. We dinghy towed a couple small SUVs that weighed well under 4,000 lbs BUT, we used them as a trailer and carried enough gear in them (as well as in our coach) that I’m pretty sure we were overweight.
We picked that coach knowing it was our starter rig and that, in a few years, we’d either get something bigger or quit being nomads. After a bit over 3.5 years, we traded for our current rig. Basically, we decided to get something big enough that we wouldn’t really need to be much concerned with weight again. Fully loaded we clock in @ about 42-43,000 lbs with just the coach. The toad adds about another 5,000 lbs. (also using as a trailer). I wouldn’t hesitate to pull a bigger toad. She’s slow off the line and slow up a grade; but she’s always got us where I’ve pointed her.
My experience has been, in the used market, comparing equal aged/condition Super Cs vs diesel pusher As, you’ll find more DPs to choose from and at less prices.
I have no doubt others won’t agree, but it seems to me, what you’re seeking will require a DP A or a Super C… imo, you can find more selection with a DP A… and more selection = more motivated sellers.