There is the small matter of money, though...
Buying the ship, fitting it with all manner of gadgets (reverse osmosis pumps, GPS, electrics and electronics, RADAR, radios, solar panels, wind generator, battery packs, emergency equipment, life rafts, et c), buying supplies and spare equipment (sails, ropes, et c), building an expense buffer, insurance, food, fuel and spares along the way...
You know, it'd probably cost more than most could pull off, especially considering you don't work at all for the duration of the trip (unless you happen to be a writer or something...).
All right, I am a killjoy...
