I've built seven acoustics and absolutely loved it. I started with a builders kit from Martin guitar and an internet connection that allowed me to run between my workshop and computer, looking at online videos and instructions. Finished up my last one, an OM28 Koa, for a friend of mine just a few months ago (my last due to no workshop space anymore). When I started, my only woodworking experience was building a deck in my backyard.
There is a whole community of amateurs out there, most surprising is that quite a few have never played a guitar (I always thought that was a waste, can't even enjoy the fruits of your own work)! Here is a link to an amateur blog board,
http://www.kitguitarsforum.comIt is owned by John Hall of Blues Creek Guitars in Pennsylvania. He is a great guy, always willing to talk to newbies (he helped me a lot). He also has a fantastic workshop, teaches luthiery, sells parts and builds custom guitars. I attended a seminar at his ship a few years back and it was a gas!
Good luck!
ttflier