Here’s a video made by Cpirius of DIY electroplating and CNC milling of PCBs. The electroplating process he uses is good for down to 26mil vias.
It looks like cpirius has made a video of his entire PCB prototyping process: Drilling holes, electroplating, mechanically etching and cutting out the board.
Read more about the electroplating process in the forum.

Isn’t there any G-code optimizer that would reduce all the unnecessary travels of the routing bit? It seems like 30% of the total time is spent moving the head long distances without actually cutting.
reply in forum (due to link-in-comment limitation)
Great stuff!
Have you thought of Tinning your final board?
I find it makes for a much more robust, and easy to solder board.
Personally, I use MG Chemicals Liquid Tin.
Always mesmerizing to watch a CNC at work :-)