I know you want small, but before you start making saw dust seriously consider the practicality of various sizes. For example, here's 16 feet overall...
That style of boat is attractive to me, but I realize that it's an irrational attraction, and I wouldn't want one here in the Northwest. Practically...
Home made versions come in around 500 bucks for everything, $700 tops. If terrain isnt rough, 3500 lbs is no problem. Building one could be fun; the...