A boat club might have some advantages. You get to use a variety of boats without worrying about the in and out costs of moving from one boat to another. You can take it for a week if you rent someplace or get a different boat if you want to go skiing/tubing one day and take out a family group. Not renting a place? Operate out of the club docks. These folks often sell their rentals at the end of the season with good pricing.
https://www.lakesregion.org/american-boat-club-of-nh/