It sucks big time doesn't it.
You work hard to get fun toys then have to work harder to pay to keep the toys in your possession otherwise some lowlife who thinks he has more right to them than you will take them off you. Then you have to pay again to an insurance Co. incase said lowlife does pinch it you are covered.
Reckon the best idea would be to use the boat as a dog house for a massive Hooch dog(ala, Turner and Hooch). Pity the fool who trys to steal the boat then.