A bit late to the party here but I think I can offer you some insight into getting into the cnc thing. I built 2 machines large enough to do guitar bodies, I bought two commercially made machines over the past 7 years, and I bought a Shapeoko2 for a winter project. If you are an enthusiastic hobbiest like I am, a $ 5000 CNC will do the job for you. The key to success is rigidity, and some of the commercial machines have it and some don't . The shapeoko is very toylike, one video shows it cutting a body in 6 hours. That is ridiculous.
Check out the machines by Velox as as example of what you can get for 5000 dollars. A few years ago K2 was a popular machine brand for instrument building. They were bought out by Velox who has expanded the line and gotten away from some of the smaller desktops.
I probably make about 10 different type guitars a year and the cnc router has become a go-to replacement for some of my other machines. Having gotten into the cnc thing over a decade ago when the softwear was in its infancy, I learned how to draw and create Gcode by hand. I now have taught myself 3D to some degree with Rhino, but only use 3D machining for carving necks and guitar tops. It's faster to do 2.5D for everything else.