If it’s maintenance they have to do regularly, there might even be a part of the pool tooled for it with arms for the floating block to sit on while they drive the lift on and off normally. Or a ramp with rollers where it gets launched like a boat and a winch to pull it back up the ramp to get out. That last one is my guess, since that whole setup could be portable as long as they had somewhere to anchor the ramp and winch.