With household or boat repairs/improvements, my theory has always been that if I try it and screw it up, I can always just call the guy who I was gonna call in the first place. It usually works out fine and I have a nice assortment of tools that I bought with the savings. I do know my limits, though. EX: when I remodeled my kitchen, I did the demo, cabinets, tile & plumbing, but I left the running of 220 power and installing the granite to professionals. On the boat I do pay someone to wash it because my time is worth more than that (weekly washdowns for $ 50 per month). But other jobs I try to do myself. Recent ones include replacing the treads on my boarding ladder and rigging new lifelines.