The manufacturer has a gvwr rating for a reason. It is negligent to overload the rv or vehicle. Find an rv that you can live with but look at the frame ,suspension,brakes and tires, then look at all the fancy stuff. Keep looking for one you can carry all your things and still be at a safe limit. There are enough overloaded trucks out there already try not to add to it. You don’t want to have an accident and hurt someone or kill them when you know you are overloaded, and an investigation will show that. Just be safe and look more at the bones than the bling.