If we can make this much profit on a 52 we can make twice that on a 60 . . . except that the bigger, more complicated, and more expensive the boats get, the more each individual owner wants to stick his oar and custome requirements into the process. And in my experience, the owner who can afford a boat like that is probably more financially savvy than the guy building it. Quite often, a boat owner will buy a boatbuilder just to get the boat finished . . .
I can see the exchange rate affecting someone stretching to buy a boat, but when I worked at Camper & Nicholsons in England, they had a simple piece of advice for buyers worried about losing on the exchange rate. If you expect to pay $500,000 for the boat, buy $250,000 worth of pounds sterling. Whichever way the pound goes against the dollar while the boat is being built, you break even.