Your first option is to sublet a liveaboard slip. Many liveaboards cruise for a season or even years at a time. Many are happy to sublet their slips while they’re away. To get one of these coveted sublets, put together a one page poster with a nice photo and description of yourself and what you’re looking for. E-mail this to the marina manager and ask if they will circulate it on their liveaboard e-mail list. Also, put your poster up on the marina bulletin board. This strategy worked both for us and a couple of other people we know. You may not even need to own a boat in order to sublet. I know of one instance where a couple rented both the boat and the slip from an owner who was off traveling for a year.