I'm not an owner, just a lake renter with some others.....
My thoughts would be keep it bare bones.
Dock
Boat ramp
Port a john
BYOB..Bring your own boat
Boathouse,club boat, shelter pavilion, showers, etc all equal more work.
Or find a good handyman or the like to act as a site manger and figure his compensation. Prolly help if he doesn't ski...lol