Remember - God does not subtract from man the hours spent messing around with boats - or something like that.
We've owned Ten After Seven, our Allied 39, for over 38 years. After several poorly done professional jobs, and attempts to way over charge, we started doing our own work. If we need a specialized tool, we purchase it figuring we can keep it for future use.
Although as I've gotten older, I do sub out things like sanding the bottom. However, and I'm insistent on this, I will only authorize "fixed price" work. Time and materials are too often a license to steal!