I am a 1 man show and I need to play musical trailers with 3 Jet Ski's I own. I can make a cradle/table for the jet ski to sit on when off the trailer, but how do I get it off one and back on the other? My ski is 538 lbs and I can't lift it, not to mention it's bulky size. I know there are others out there that don't have help of others that have to deal with this. I can't do a crane because I have to transport it through a low door into my shop. I need ideas that are a bit more...... creative. Leverage maneuvers, tricks, etc that will allow me to prop and wiggle the ski off and lift onto another trailer. I really don't have any ideas so whatever you have I'm interested, but I'm not looking to buy anything specialized to do it.