Class 5 hitch has a 1200 pound tongue weight. A hauler that will haul a harley is easy enough to fabricate.
Could/should tie the outer edges of the receiver frame to the hauler for less twisting.
I "beefed up" Cannon Shots Versa hauler for him when it was coming apart at the seams.
I think you could haul a yugo on it now.
Air bags on the rear suspension if the load is too much for the van/truck. Then you are stock empty and plenty of holding full.
Hard to tell, but there is 1/2 inch plate making up most of the bottom of this now.
Also the original thin Versa Hauler steel for the deck and sheet boxing in the rest.