For $62.00
A guy drives to my marina, puts his air tanks and other equipment into a dock cart pushes it to my boat changes into a wet suit straps on his stuff jumps into the cold water, and spends 1/2 hour in the murky water scrubbing my boat mostly by feel. Sometimes he has to replace anodes, again mostly by feel.
When he's done, he climbs out finds a hose and rinses the mud and critters off then changes out of his wet suit, gathers up his stuff, returns to his car and heads for the next job.
For $62.00! He gets no health insurance no sick leave and no paid vacation.
I can't imagine trying to save $62 by doing this myself.