It's a one time only expense, for advertising. Much like lettering on the side of a truck. You don't get to a write off for advertising every time you drive the truck. My first thought is can the business comfortably afford the expense? Because if it is not marine related it would be a waste of funds for advertising as only other boaters will see the sail. But if that is your market go for it.
Can't wait...I just can't get enough cow bell...I mean advertising. We need more cow bell...advertising "exploring our space"! Then maybe line the waterways with billboards. The possiblilities are ENDLESS!