I would like to backup Kevs posts on this one, running courses is not especially profitable once everything is taken into consideration, most of those things the average attendee wouldn't even think about but they still need to be done and paid for.
Secondly, personally I have never met a caretaker who knows the first thing about floor maintenance so this has to be just about the worst idea imaginable, I think it was probably a tongue in cheek suggestion,
Terry