I see that no one wants to weight in on this one, humm I wonder why. I guess the logical place to lift the boat would be one line from each corner where the tramp joins the hull?? The boat is not all that heavy, would you be lifting the boat fully rigged and ready to sail? If yes you would need a very tall crane depending how far up you have to lift. The motor boat guys have a ramp they park on then the entire ramp is raised up with a large wheel (or electric in some cases). Maybe you could get some aluminum 1" pipe and fabricate something like that. I just have a 6, 6ft. long pipes with Polly rollers and some rubber roller guides, but I only have to come out of the water about 8" or so.