A general view that I have is some of the problems run into while owning an rv is that you have to be very creative in order to properly solve some problems.
I too have a NL camper and find that with enough thought and planning you can usually have a good solution come on sudden or take some time for it to dawn on you. In my case I wait awhile since I never want the easy way or first thought to influence my decision, shall I say, I always strive for the better way. Often easy to tell the best solution as it is usually the most difficult as well.
I rebuilt my hatch cover from stainless steel with a commercial hinge, resupported the cab over from sag, reinforced the basement sides, upgraded the water fill port and the city water port. I have installed a marine 4 stage charger and battery switch with accurate gauge. Installed a bilge blower to help air out the belly of the camper after much use with intake and exhaust venting. Needless to say I went overboard as an owner for 17 years now.
My hope is that I can instill some ambition to figuring a solution. Perhaps you will even get something on the market that will make you money and help others as well.
I got into fixing everything on mine because like many folks I don't have 49 K laying around to go buying another one. I need my money to enjoy it and go places. I just got back from a trip and want to go again ASAP.