I've been trying to fix all the outstanding items on my boat for the last, err, 10 to 15 years.
It's a fools game. Unobtainable. You will go mad trying to achieve it. Like trying to achieve perfection.
By the time you get to the end of the list, the stuff at the start will need fixing or replacing again.
Sure, you def need to fix things like bearing screech and the water pump, but I'd really caution against trying to get everything perfect on a boat. You will go mad.