A few comments for those who want to go down this route:
1) you probably should buy a machine, rather than designing and building one, if your goal is to use the CNC. It will be cheaper and more of your time will be spent CNCing instead of rediscovering the painful lessons learned over the past decades.
2) he says woodworking equipment is only good for wood, but it also works for aluminum
3) ignore all the talk about grbl on arduino due or mega, use FluidNC on ESP32.
4) a dewalt 611 will work better than any spindle that costs less than it, and also many spindles that cost more, if you're working in just wood. This is a controversial opinion, if a spindle makes you happy, go for it.
Yes, don't build your own CNC or plotter (from scratch). OpenBuilds has a good range of options and also a fairly active community of people adapting their platform for custom uses.
2) he says woodworking equipment is only good for wood, but it also works for aluminum
3) ignore all the talk about grbl on arduino due or mega, use FluidNC on ESP32.
4) a dewalt 611 will work better than any spindle that costs less than it, and also many spindles that cost more, if you're working in just wood. This is a controversial opinion, if a spindle makes you happy, go for it.