It seems like it would be worth shopping with whoever has a "normal" CNC machine nearby, and seeing if you can get your stack of plywood machined for less for a given project. If you make a mistake with DIY, you're potentially out a sheet of plywood, not to mention time and effort.

Your project will involve plenty of time and effort at other stages than the plywood cutting bit.

Still, I'd consider getting one (perhaps on v2 after the Kickstarter has played out, and v1 gotchas figured out). It is cheap enough to get "just for fun."