At a yard sale a few years back I found a hoist table like those used in most bike shops only this one is real heavy. It originally came from a paper mill and was used to lift bundles of paper. I was told it was rated at 8,000 pounds but I can't find any numbers on it.
Anyway, I dug a pit in the floor of the shop and set the hoist in the pit so the top of the table is about even with the floor. Now I simply run a bike or sled onto the table and push a button to raise it.