If you have the height to raise the keel off the slab and are considering hanging the boat from existing overhead structure, like garage ceiling joists, chances are the members will be insufficient for the loads.
Consider hiring a structural engineer to size two beams at points strategic to sling locations on the hull. Otherwise, purchase a set of boat stands which can be repositioned as required when doing bottom work. - Brownell Boat Stands
Problem with stands though is the convolutions required to remove the trailer.