That's very heavy.
- I would either look at a smaller model of mobility scooter. My mom had one and it only weighed about 100lbs. This was not the light duty one.
- Or consider bumping up to a golf cart for more capability.
Personally, I would prefer a swivel wheel trailer. 500lb hung off the back with just a 2" square tube is a lot of stress and strain. With a swivel wheel trailer, you start with around 50% of the weight off the hitch. The hitch is actually two receivers and there is no torque applied to the hitches so they are under far less strain. (this is not the same as double towing as the trailer is locked in line with the camper and you can turn and back up the same as normal).
