I’m just thinking out loud here, but because I ride 99% salt water, I would think that other than the obvious sink hazard, that corrosion would be your #1 enemy. Even fresh water has corrosive properties so leaving a ski in the water for extended periods of time isn’t a good idea. The bolts in the pump and hull inserts which have had extended water exposure can freeze up and worst case scenario can break in the hull inserts when they need to be removed. Believe me, you don’t want to go there. If you plan on any type of long term storage (long term being defined as longer than a week end) then I would go with one of the floating docks that have already been suggested