A cost-effective machine can be refurbished with better parts after some time: better screws, well controller, and the price of a sensible total machine aren't a ton over building it without any preparation yet spares you several hours.
If you can really be completing 3D machining in a factory or change then you require a CAM programming pack like Main Cam, or Bobcad to produce the 3D device ways for you and yield the G-code for the machine to utilize.