i think you gotta slow things down a bit matt. I know you like money (hell so do i), and building guitars, but remember you got time, you're young, its not the end of the world, so don't worry about trying to get all these bodies out right away.
if you get a patent and sell the body to a company, and you keep building them and selling them, their is a possibility of a lawsuit going on there.
LGM is right, companies aren't all gung hoe to taking independent designs, look at what happened with Les Paul. He brought in his first design, they laughed at him, now it's not so much Les paul is Gibson but Gibson is Les Paul. They have other popular designs but none so much as Les Paul. There are a few times too when Gibson screwed around Les Paul with royalties, endorsements, and other things. I think the most noted was with the SG. Les Paul wanted to change the design and Gibson said no and pulled the plug on him (i believe). Every recent picture i've seen of Les Paul he's playing the Les Paul recorder, it seems like him and Gibson have a social agreement, "lets leave each other alone until some kind of anniversary comes up" lol.
I say forget about patenting and selling the idea. I say make yourself some small goals and large goals and write down what you're going to do to attain them, and work your way up, and if you're stuck you can always PM LGM, Myka, Perry or anyone else around here that i forgot to mention who has their own guitar business.
"If you BUILD them, they will come" - if you really love what you're doing, and work at it extremly hard, you can make it. No one says "NICE AXE MATT!" for nothing.
-Jamie