i have one.
2500 lbs. ( 2500lbs winch have pulling power of 12 man.)
portable,in a ammo box.i pack it and take it with me only when travel or do trails.
it can be unpacked and attached at a front or rear in less than 5 min.
i get stuck every second month plus i do 3 weekends a year as recovery weekends.just for sake of practice.
2500 lbs winch + 1 pulley recovers bakkie on a trail up the 20 degree incline with no sweat.
2500 lbs winch + 1 pulley pulls bakkie trough knee deep mud.
safety factors for shackles and mountings are important,as they cab break and cause injury if misused.
winch - when over loaded- just stops.in this case i dig little
or add another pulley......
unfortunately this setup does not come with "cool factor" to brag about around camp fire....
but it works for me.
PS
my setup,all together, weights about 10kg packed in a box(winch,pulleys,rope...etc)