Going with advice from forum members (Lorna S. especially, thank you) I've made up my mind that I'm going with a small house or dorm refrigerator. I have some questions about securing it on board, and keeping it ventilated. Refrigerators often are marked, "FOR FREESTANDING USE ONLY." I'm assuming that is to assure proper air circulation around them.
Kind of defeats the purpose of having that tough steel bus if the refrigerator goes flying and smashes a passenger in an accident.
I also want to be able to have it next to cabinets etc., depending on floorplan. My original thought was to have it between "studs" and mount a side vent from an RV in the window space and also the roof vent. But is this really necessary?
So I've thought about a setup like in the illustration below. It'd be screwed to a frame via the holes for the unit's feet; the frame in turned anchored to the floor structure. Refrigerators are still available with the coils on the back - where they get plenty of air - at least when freestanding in a building. This setup would not require an outside vent and therefore not need to be between studs.
Also, where are the best places to attach anchors to the refigerator box without F'ing up the insulation or otherwise damaging it?