He was sanding the bottom from his wheelchair in the winter.
That is some serious determination.
You know ... if there is someone teaching ASA classes I am sure he could find people willing to crew. I would have liked an opportunity like this when I finished mine and did not have a membership in the school's sailing club.
He may want someone with more salt than recent ASA graduates - I put a nice scratch in the gel coat on my first return and it was daylight and I have no mobility issues :-) If that guy sanded the bottom from his wheelchair over the winter I'm sure he won't have problems borrowing a set of legs attached to an eager sailor. If I was nearby I'd offer to crew for a chance to sail.