the expense, I think, is driven by cramming so much into a small space... imagine that each piece of cabinetry has to be able to fit in thru a door or window opening- then put up.
nothing is square and it's all curvey on the backsides.
the premium builders ( both quality and cost) use better materials- much of my cabinetry is solid maple
some makes and models, such as roadtrek drop the floor a couple of inches, which adds to the cost.
the space is truly tight- if you are tall you can rule out sideways sleeper models unless they are widebodies.
youtube videos from dealers will show the features of various model and you can get a good idea of space by watching the salesguy move around inside the van.
the upside is parking, driving & mpg. ours is a chevy , so easy to work on
We really like our 2006 Pleasure-Way Lexor TD and travel 2 + big dog
we use it for weekenders and did a month long trip from AZ to MI and Ont this summer
one other thing which may or not be valid:
crashes- last weekend a guy rolled an A on the freeway here- it folded up flat, ending up about 4' high.
i think I'd do better in my B.
my local craigslist is where I found my B.
right now there are listings from 80k to 10K depending on what you want
Mike