Sorry to hear about your misfortune with the new Trilly. Having just redone the hubs on our '76 Trilly 1300, I can tell you the steel rims on our Trilly are not going to come off anytime soon. I had purchased a torque wrench and used it to make sure the lug nuts were in torque, after first tightening them manually.
This may sound very negative, but in my short 5 yr experience with rving, I have learned to research and double check EVERYTHING ! Doing this for sure takes a lot of extra work, but is pays off bigtime, and you are reminded of this when you look at your wallet and safety record. There is no one person who can reliably answer all your questions accurately.
Examples on used class B rv:
(1) gas heater does not work, $200 to pull it Fix: set the thermostat correctly
(2) your rv passed safety inspection Fix: smoke, co, propane
det not work
(3) you are ready for your long trip Fix: tires
all D rated, needed to be E
(4) you need to replace gen fuel pump Fix: carb cleaner and new bowl O ring
hardly used, 5.5 yrs old Fix: balance 2 tires, retire one worn
(2) Frame in good shape Fix: weld plates on front & frame jts
(3) Everything works Fix: add ext. tail and brake lights
(4) Shell is very sturdy Fix: light
pressure put a crack in top
Good luck! You can do it and have fun like the rest of us!