I wasnt trying to take anything away from what you do, i too have mops attached to a proper motor unit for polishing...
I dont think anyone looks at the number of hours in terms of wages, but as a love of the hobby, its like brake pads for example.. you can buy them and sometimes take 1-2hrs fitting them,the cost would probably be cheaper but people do it to learn...
I can imagine the number of dishes you see half polished with sanding marks in them haah.. i myself have been halfway through an inlet and thought f**k this haha..each to their own hey.