Shoey-Skimy friends and I have been wanting to do this for a while, I feel like it would not be hard to make, but could be a little pricey, I've seen some people who just tie a four wheeler to a tree and dig under the tires and run the rope on a tire but that is pretty ghetto haha, jobs for cribs had one in one of their videos that looked very legit but I feel like they made it themselves
A fourwheeler would work great! As long as you can keep enough tension so that the rope stays on the wheel. That's why you need some sort of a ghetto pulley system, which is very doable. I think you could do it for a couple hundred bucks if you had to buy an old riding lawnmower or engine, but if you already have sometime to power it you could do it for less. I think you guys should try it! If you have a bit of skill with making stuff work. I'll post a link on here of a system I absolutely loved if I remember.