I am new to this forum but have been camping for over 60 years, from tent, popups, travel, Class A, and now a Class B (oops, just dated myself).
When evaluating our B ... I ...
1st started with the layout ... does it make sense to be in there for an extended time.
In this section, I wanted an inductive cooktop (reducing propane inside the coach), a compressor-style frig, and a better water heating system.
2nd, do you want to make a bed every night? It doesn't take but 3-5 minutes so that was not a big deal for me.
3rd, as storage space is somewhat limited, organize your thoughts first where things would go (relates back to step 1)
4th, I have owned many personal vehicles (new to antique) ... which chassis do you feel most comfortable with? My son is a Mercedes mechanic, and as well "documented" as they are ... they have some design issues. Ford, is well received but also has its "issues". Dodge has been reported to have some steering concerns (although I cannot confirm and will let others jump in on that). To the others that might respond ... I do not like to point out problems ... but rather concerns or issues ... as they all have some.
5th, WARRANTY ... yes, it is key. Most of the manufacturers provide a 1-year coach warranty ... investigating further, these are usually NOT transferrable.
Finally ... we chose an American Coach Patriot MD4 because it offered legal seating for 7 ... the bed can be made up each night. While happy with our choice. I might have gone with Pleasure-Way (we just couldn't locate one that met our needs).