^ me too!
I'd first build those 2x4 stands with a little twist. I have a little add on so I can raise when I need another 10".
I builded my own rotisserie, made it a kinf HD version, it can be tow'ed with car/truck/ ATV, it has trailer hubs with 13" wheels or it can be pushed too.
After this pic was taken, I've shorten the uprights so it will fit inside my enclosed trailer and add'ed an towbar that turn the front wheels at the same time.
And also the pivetpoint of the car is made from trailer hubs so its easy to turn with one hand and locking wheel to lock the car to almost any position.