The larger liveaboard type boats, whether sail or power built in the 80s are now cheap enough to buy, liveaboard and cruise moderately ie with minimal mooring changes, rather cheaply. Fortyish foot boats can now be purchased for $50-75,000. Sail examples: Whitby 42, Pearson 424, Morgan OI 41. Power examples: Marine Trader 40, Ocean Alexander 40, Grand Banks 42.
These make very economical liveaboards, particularly in Florida if you anchor out or use moorings such as in Marathon, Dinner Key, St Augustine.
Unfortunately some will end up as derelicts after the charm has worn off or a major expense like a blown engine makes them undesirable to live on any more. Florida in particular needs to use some of its marine related taxes to remove, and dump these derelicts.
David