The Dodge Promaster platform motor home reminds me of the Toyota based motor home from 1979 to 1988. Both having single wheel rear axle load limitations, the curb weight was so close to the limit that you couldn't take anything with you on a trip including your own family. Of coarse people ignored the numbers and drove around the country with their rigs over-loaded.
I would never consider any motor home built on a Promaster cut-away chassis. I can't understand why they are permitted to make them. The NTSB should not have approved that chassis for motor homes. Make box trucks that haul Styrofoam and children's backyard slides and such..... bulky, light weight cargo. Not a house with people, water, and all the rest.