I added a winch to my motorcycle lift after having an accident trying to load the lift on it by myself. I purchased a small utility winch from harbor freight for around $70 and powered it with my lawn mowers battery. I created the mount out of scrap wood I had around the house. There’s still room for improvement, but for only having the cost of the winch into it so far it works fairly well.
I plan to build a metal mounting system for the winch in the future to make it sturdier. As well as improve the wiring and maybe mount the battery to the lift as well once I get a dedicated battery for the system.