-- Last Updated: Jan-15-13 5:46 PM EST --
...aren't really hard to do - just tedious at times. I helped a friend do his 16'last summer, and would estimate it took about 300 hours in labour from cedar 2x6's to a finished (and absolutely beautiful) boat. We did have the advantage of being able to borrow a set of stations - the forms you use to build - which saved a lot of time.
I've built a number of stitch and glue kayaks - there are S&G canoe designs out there, but the hulls must be multi-chined, since ply bends only one way - it is a very simple and quick way to get a boat done. I estimate about 80 hours for my VOLKSKAYAKs - a 17', 24" sea kayak weighing about 45 lbs.
Don't sell the wood/epoxy boats short re toughness either; my first VK is now 12 years old, and all it has needed to keep it in great shape is bi-annual paint and the repair of a partial crack in a hull panel it got when a wave dropped me on a rock. I don't deliberately beat it around, but it hasn't been babied either. And with both S&G ply or cedar strip construction, you can always repair anything you've built quite easily...
There's a tonne of info out there on the net - just Google around, and if you can find someone nearby who's done a boat or two, you're absolutely golden...lol...