It depends on the distances u need to extract, I've seen threads on here asking about 100m plus off rope, its fairly unrealistic to handle/manage working with 100m lengths of rope. It can be done but unless very steep/heavy I'd probably opt to struggle on rather than unroll/roll the rope
For just occasional deer it is a lot of cash to buy a capstan, also even carrying the capstan to where its needed would be a separate journey to motor and back
With block and tackles its simple physics/maths, every time u double the rope up u half the effort to move the weight but have to pull on the rope twice the distance.
So if u had a 100kg deer to move up a 10m steep hill, doubling the rope once it would feel like 50kg but u'd have to pull 20m's of rope (another loop 25kg and 40m).
U can buy cheap lug-all types winches from aldi etal cheap, don't get a lot of rope with them thou.
Ucan buy tirfor copies now that are very good, the 800kg model would be plenty, (must admit never used an 800) but the 1600 is getting heavier again the 30m wire rope can be a pita to deal with, the 3200 are heavy to carry any distance.
But a 1600 would be able to self rescue a stuck 4x4
Simple common sense things like putting deer into a sledge, lifting as much as possible of ground raising block/winch as high as possible
If u needed to use a block and tackle up a steep bit u can also redirect where u pull the rope with a quad on top of the banking, or if ur really struggling walk down the banking with the rope and use the bankings steepness to help u
Even in forestry there now putting cones over tree butts when whinching/skidding them out to try and stop them snagging on things and reducing drag
