Biggest mistake overall was in my purchase of a camper without full appreciating the amount of expense and work involved to add a second battery, add solar panels and a charge controller, and to re-caulk all the exterior seams which is supposed to be done twice a year.
I would approach the buying process with these aspects of the campers' designs in mind. I was looking at amenities and hold tank capacity and fridge capacity and although important so too was being able to have two batteries and the solar panels for boondocking.
Maintenance and problems from water leaking into the ceiling and walls is also not trivial and no doubt varies based on how the campers are constructed. I would do a lot more research in this area before buying another camper. The sturctural integrity of campers is low compared to motorhomes and this should be a consideration when deciding what to buy.
