I'm looking at a 4 axis hobby cnc for around $5-6k. I am pretty good at cadding (inventor), and have a good amount of experience with a 3 axis cnc. Tolerance is <.015mm and it can mill steel aluminum etc.
For the 3d scanner, I've seen some 3d scanners on youtube, and I assumed they were reasonably accurate. The problem I was seeing was whether they were accurate enough, and whether it were possible to get anything more than relative sizes from the drawing that poops out.
Currently I'm using cut2d/cut3d along with mach3 currently, but I'm going to need a new cam software (assuming I go for the 4th axis)