Just finished my books for week 8 and in spite of telling three pupils to find another instructor, in 8 weeks 42 hours have been cancelled.  
Mortgage paid off and apart from not having to work at all, we just want to be able to afford two holidays per year. So I suppose you could say I work part time as anything over 25 hours a week is a bonus. 
Imagine if I worked the hours other instructor did the amount of cancellations they'd be able to wrack up.