Not free but usually a good deal, cheaper than buying
a waterfront condo.
We had looked at condo's before we hit on the boat thing. With a sailboat and decent dinghy
you can get to most any beach and you can move it about with the added enjoyment of sailing.
Around our area a beachfront condo cost at least $200k up front and $350 in dues a month.
Depending on how much work your willing to do you can get a decent 30ish sailboat for under $15k and make her right. As a non-full time liveaboard
Marina fees would be about $350 a month for a slip, $200 for a mooring
or you can put it on the hook for free and take your chances.
When traveling you can be on the hook and save. Added bonus of getting a passport and going anyplace in the world you want and having your stuff with you.