Demountable camper group

Does anyone have one of these, what are the things to look out for, I'm thinking of buying one and wondered whats best

good idea or not?

I have that very thing. Use it to move trailers etc. I wouldn't trust it for something as heavy as a small tractor. Try mine first before you buy one

Can we hook it on something and break it?

Avoid Chinese the metal is not the best holding it all together and the cable liable to kink,
but heavier than you (think) need

Have used Tirfor winches for moving boats, pulling down trees and all sorts. They have the advantage that they grip the wire and move along it without coiling it up. They come in all sorts of sizes. Very tough and reliable (but heavy).

Want to see if it will drag things onto trailer (not tractor)