From 2018-2020 we owned a 2001 RoadTrek 170 (Dodge B2500 HD Van). The previous owners had removed the toilet and fridge and made cutouts to extend the length of the bed (the 170 is short, and crosswise sleeping only works for short people). The cooktop, water heater and water pump had also been removed, so we mostly used the shore power setup, microwave and AC unit. We only drive it 2,660 miles in the two years we owned it, and used it to camp in Florida & Georgia sites with water/power hookups.
We liked the permanent High Top, but really missed the fridge.
It had three seats, and a small bed could be made up from the rotated passenger seat and the 3rd jump seat behind it. It also had a U-shaped dinette in the back that converted to the bed. I found the provided cushions to be lacking, so we bought a 5″ foam mattress and cut it down for my side, and had a permanent bed for most trips.