15 year loans are fine if you know your finances and do it right. Everthing Depreciates except houses.
If you sell any boat, car or helicopter
after making only 1/5 of the payments your going to lose money, weather or not you put that money down up front, take it in the end, or a little of both.
key bank, eboat loans, credit union, coastline, check out boat trader online's resources and don't settle for a crappy rate just to get the boat.