Hi Scott,
I have the Mini Mover with the solid rubber wheel which I got through Waverley Mowers online store in Victoria. I have a Jayco Hawk, pretty much the same as your Swan and it moves it around no problems at all, even across the grass between the garage and fence. Not so good now the ground is soft from the recent rain. I've got the usual lip from the grass up into the garage which it cant do without some help from the winch I have mounted in the back of the garage. I bought a ride on mower battery from Supercheap when they were on sale and it sits in the jerry can holder when moving the van. I think from memory I paid $350 plus freight but haven't looked back since.
John