A very broad marina question

[hellosailor]

Mark-
If you are planning to keep your boat someplace outside the US, just check up front on any complications if you keep it there more than a year. Might be import duties or other problems, the same way that a foreign boat in the US only gets a 1-year cruising permit, etc.
Even if you keep it in the US, bear in mind that you probably will have to register it, and perhaps pay sales on on it, in the port/state you keep it in, if it is there for a time even as short as 30 days. (Motor vehicle codes can kick in that soon.) Just one more thing to check out, more of a concern if it will be overseas.