Lets hear your suggestions for a winch for a car trailer.

10K Ramsey gear reduction that is about 40 years old sunk into the bed of the trailer with a glad hand setup.
Welding lead to dual batteries on Dodge 3/4 ton to receiver hitch.

Always plenty of power.

You just need to run one power lead to truck batteries and the negative can go to your frame in the rear by the winch.

If you can not afford or find a deal on a big winch, look into a good snatch block set up.

I have been using this setup for 25 years on the same trailer and my power leads have been used on three different trucks.