In the last ten years the only time I've let someone else work on my boat was to install a holding tank. It needed to be done and I just didn't have time to do it. The "professional" I hired hooked up the hoses backward and butchered the cabinetry re-install. I spent a day fixing his mistakes because I wouldn't let him back on my boat to fix it himself. I like doing the work, I just need to find the time to do it.