In regards that MH's break apart; it's cuz there's WAAAAAAY too much tongue weight ! AND the original hitch mounting structure is waaaaay under designed and under built. I see so many trailers with the rear bumper of the tow vehicle just a few inches off the deck with the front tires having little control contact to the pavement. Put that same trailer/load combo on a motor home and there isn't the obvious visual overloading BUT there's still that tremendous tongue weight.
Properly placed loads on the trailer is of utmost importance to vehicle and trailer control. Balanced so there is enough tongue weight to prevent 'whip the tail' without over loading the tow vehicle.
Before I hitch up a trailer to my MH, I hook it to my pickup and measure how much the rear bumper sinks. I then move the trailer load to where it's optimal, secure it, mark my trailer where a front tire is ( so I can reload the car in the same spot ) and then hook it on the MH. This procedure might also include a spin up the local highway to ensure stability at speed, stop adjust and then highway speed again until it's acceptable(SAFE). As I haul 3 different cars regularly on the same trailer I've tire placement marks permanently applied for each car.