Having done this job a time or two, I can tell you that there's a couple of variables involved.
One, do you know what the previous layers of paint are? Hard or ablative. If it is hard paint, the work load just doubled or even tripled if it is Trinidad (stuffs just plain hard).
Two, how many layers?
Three, what kind of environmental laws are in your state? Some states it is illegal to sand without vacuum systems, some states it is illegal to do it yourself.....a professional/licensed boat yard is required.
Since you boat is fairly small, it shouldn't take too terribly long, but you may find that a sharp scraper will cut through it like butter, until it dulls then you need to sharpen or change blades. Here's a good one:
Sandvik / Bahco Double-handed 655 Ergo Scrapers
Finish off with a random orbital, I don't think you can go wrong with the big names like DeWalt, Porter Cable, Milwaukee, Bosch, but sty away from cheap ones like Ryobi and Harbor Frieght, they'll have a significantly shorter life. Make sure they are comfortable to hold inverted, sideways, backwards while applying pressure. Variable speed is also very helpful...helps from burning the paint and gumming the pad.