Well that one in the video is pretty expensive but there is plenty of DIY stuff around for a lot less, worst case you can build up from your own steppers etc, the research adds to the fun much like 3D printing.
I don't see that it can be so different from a 3D printer, tons of stuff out for those in the open source domain. Could either buy a dedicated kit of parts or I've found some plans from a Swedish firm. The setting of levels, origin and boundaries are standard CNC procedures, just need to decide the detection method, but it looks interesting.
Thinking about this you could make one with an interchangeable head and have it be a printer too - so you can print your enclosures, engrave your labels, build your PCB's, print your knobs ..... the plot thickens.