A couple of years ago, my buddy and I (both retired Merchant Marine Chief Engineers and Certified Welders) were at the RV Show in Tampa, Fl. They had a Prevost shell there. Well, we were inside for about 10 minutes when we were asked to leave. I guess they did not like us pointing to the welds and laughing. I swear my 12 year old Grandson could lay a better bead down. For what they charge we were shocked at what we saw! Some of the welds looked like someone chewed a piece of gum and stuck it on there.
So, while I'm sure they are better than most RV's (sad to say) I would hazard a guess that they have cut back on quality as most have.