My boat is moored at Monroe Harbor downtown Chicago. I commented once to the tender pilot (we have a tender service out to our boats) about all the boats I see moored on the weekends with no one aboard. We're talking anywhere from $200K+ yachts (both power and sail).
He said you wouldn't believe how many of these boats sit there all season and the owners never visit except for 4th of July and Venetian night, rest of the time they just sit empty. Unfreaking believeable.