Emergency fund from what Free said in the Carib is doable but if the bigger boat problems arise that fund won't do. Last minute airfare will cost upwards of over a $1000 a ticket. That doesn't include storing the boat and money needed once back in the US. Also if the engine totally dies, sails ripped to shreds, demasted or serious water incursions that fund probably won't cover it. Most cruisers I believe up that to around $10,000.
Yes, Dog, Fiji isn't in the Carib but one never knows where the wind might blow you. If you rely on my celestial nav, Fiji is definitely a possibility.
Plus I hear the women and men wear less.
For some people liquor money can be the biggest daily expense. But home brew will take care of that nicely. Maybe Freesail can gives all some tips on making home brew wine.