I'm new to this site, but not to Prevost conversion ownership. I'm also not new to the perceptions of folks about bus conversions and their owners.
The short version of the original questions that started this thread is that you can buy a Prevost conversion, fairly new and in excellent condition for less than you can pay for a new conventional motorhome. The folks buying the conversions, new or used ar probably shopping along side of you at Wal-mart.
The converters who have built Prevost conversions do vary in quality and decor, but in almost every single conversion the quality levels are high and ownership is usually very trouble free. Those buying conversions need to do a lot of research before they take the plunge, but with the help of folks on some sites specializing in Prevost onversions and from the converters themselves they will learn what they need to make a good informed decision. Every converter has their own way to design systems, seems to have their own decor style, and targets a specific niche.
The owners of conversions will probably never wear one out. They may require some reupholstery or new carpet, but the Prevost shell is going to provide millions of miles of service. It is not unusual to find a ten year old coach with 100,000 miles in almost new condition for $200,000 to $300,000 that will have features and service life greatly in excess of any conventional motor home that is brand new. For those with money to burn you can spend $1,500,000 to $2,000,000.