As to the POs question/s;
I have seen the same in the small marina I frequent a a few or four times a year. There's a particularly lovely BIG yacht taking up space at the "T" dock on the end of the pier. It doesn't seem to have moved in years! Prolly one of those Corp. deals
There's plenny of boats not (apparently) sailing on any regular basis. There's even more of them moored!
I often wonder how folks can afford NOT to use them... then I realize my motorcycle only got a few hundred miles logged this past season.
Yes.. colour me jealous