I'll add to that "Good luck getting a slip or mooring." Not a boater, but I have friends who are; there's a waiting list. The longest have been waiting for 5 years.
Where I live the marinas have a problem with derelict boats. The owners buy them for cheap and then abandon them and go no-contact once the repairs get too high. So now the marina is stuck with $20k+ disposal. Financially, boats don't make sense so if you approach the marina as a live aboard trying to save money (LOL!) they will see right through it and imagine the headache you're going to be.