Easiest solution
In reply to the original question, there is a much easier solution that only someone coming to the problem with a truly open mind would think of:1)Remove all stays and shrouds.2)Get a power augur and drill a deep hole in the ground.3)Turn the boat upside down with the mast going into the hole. This will help stabilize the boat too.4)Paint the boat bottom, without having to bother with boat stands, jack stands, jacka___es, or anything else.5)Lift boat and turn back over, and voila...!In fact, this is such a brilliant idea that I think I'm going to patent the technique and go into business. If anybody would like to invest with me, please contact me. For potential investors: I also hold title to the Golden Gate bridge and am willing to sell partial ownership to you also. Contact me for details.