Nolatom, perhaps inadvertently, reveals an important point. Waterborne transportation of commercial goods is the cheapest form of transportation there is available. From ferry boats to freighters, nothing moves large quantities of people, possesions, and cargo as inexpensively. Not necessarily fast, but cheap.
And, as Tom notes, when you put a number of people on a sailboat in pursuit of a destination the costs can begin to approach negligible. As I have had recent cause to mention, "speed costs money" how fast do you want to get there? And btw, are there really any sailors out there who are really not Dutch at heart? (g)
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.