Fortunately for me I actually found this swivel wheel on E-bay about an hour away from my house and I got it for $500! The company website is
www.swivelwheel.com and they are EXPENSIVE from them. You can buy just the swivel wheel assembly from them and build your own platform though and from what I've seen in this forum there are some folks who could certainly do that. The hitch is the Hidden Hitch Motorhome hitch...82201 (needs to be wide to span the frame) and it is bolted on....I think it is the same hitch that Ozz and others have used. I moved the rear stablizers forward a little....I used the forward mounting hole for the rear and drilled 2 new forward holes for it. I took the hitch and the swivel wheel mounting bracket to a welder and he welded on the dual attach points to both the bracket and the hitch.....it came with a single attach point and was pretty wobbly. A golf cart might be a bit much, but you'd have to know the weight of it to know for sure...there are some specs on the swivel wheel site. I'll try and get some clearer pictures of the attach points today and post them.