My friends clean their bottom with a hooka rig. It is gas powered and the most convient place to put the
compressor is on the aft
deck. One must be very careful of "station wagon effect" as the breeze likes to curl around the back of the
boat. Sometimes just moving the unit three feet one way or the other will fix the issue.
A friend and I removed and replaced the props on my
boat once. He was in better condition than me but even he needed a couple of breathers. Big thing is to use lines and have the right tools. Like the old Sarge said, "If you're going to be dumb you better be tough."