#1
im going into 12th grade and need a senior project. just how hard would it be to build an acoustic guitar? and how much do you think it would cost......
#2
Check out the Guitar Building and Customization board, especially talk to CorduroyEW, hes a professional luthier and builds acoustics for a living. The only setback besides the knowhow is the tools are very expensive. Contact him and he can explain it all in much detail.

Bry
#3
Martin sells an DIY acoustic guitar kit for around $500-600. Check out Musician's Friend or American Musical Supply.
Hi, I'm Peter
#4
stewmac.com or stew-mac.com, i forgot which it is, sells DIY packs for triple o guitars dreadnought ect. check them out reasonably priced to
as the difficulty rating goes, i myself never tried to build a guitar but imagine that w/ enough patience it could be done