Better build for the higher end ones. We have had a Pacearrow, Winnebago chieftain, Newmar and a Blue Bird Wanderlodge. The Newmar was build better than the first two and the Wanderlodge was no comparison to the first three. All were Gas except the Wandelodge.
The Newmar Mountainaire was a great RV, build very good and not many body issues. We keep it 16 years. The Blue Bird was a 2003 and build was very high end like you high end Monaco and other higher end couches.
Find something you like and afford and enjoy it.
The Blue Bird had the best drive train and suspension. No upgrade required. The Newmar I added air bags to made it ride smoother and it did.
No sure what you going to find in a 30-32 foot size.