i know i am a while away but i do that kind of stuff for a living at my shop. We could always work some agangement like UPS(we had done that) and me delivering it(i have done that on the way to seeing a relative). We do all the computer/design work and print it out to let you see it and approve it. We dont really do whole boats, maybe a couple a year, but we do hundreds of names and reg. numbers.
Keep in mind(prob. why we dont really do a lot of whole boat graphics), the vinyl will be much cheaper but will natually not last as long. Unless you wax it often, really often or keep the boat out of the weather. We normally use Avery vinyl but have used others at the buyers request. We have many many different colors to chose from and can match basically anything. There is pretty much three different quality of Avery vinyl that we use.
A3 is what you call a 3 year vinyl
Me personally, i would save up for someone to airbrush it or leave it whited out. Hope this helps.