I have no idea what a Prevost is but I am pretty sure I would not be impressed. I started camping in a tin top Westy (home made). Some of the finest people I have ever met camping are on the VW Vanagon list. People who would give up a trip to help others get through their day. I have met people who organize Pay it forward campaigns to help others less fortunate make it down the road.
The camper is gone (no terlet for the GF) but we now have a 20 ft TT *(Shadow Cruiser). Picked out because it's all we need, it's about all that will fit in the driveway, and it's what I feel comfortable taking out on a Saturday morning on an hours notice to spend the weekend camping. I still am on the Vanagon list (how do you replace friends?), still read about shared problem solving, still offer what I can in space to park if needed to a great group of people you might not think you want parked next to you in your fancy camp ground. Would be your loss.
Life is too short to judge people on what they drive, what they camp in.
As far as keeping it clean? The inside is spotless (thanks GF) and the rig is well maintained. I will admit that when you work 60 to 70 hours a week, washing the TT is not a high priority. You won't be embarrassed to be parked next to mine but it's clear that it is not waxed every three months. AND, nobody has ever been turned away without the offer of a glass of wine and a comfy camp chair. The price is a ton of war stories.
Best of luck coming to grips with your camper envy.