Joe’s plans are for a machine with a 4 feet by 4 feet cutting area. The original plans called for lead screws, but these have been replaced with a rack and pinion system. The plans have been modified by the very active and helpful users on the Joe’s CNC forums.
The plans cost $100 and include downloadable blueprints and access to the private forums. The carraiges are made from MDF and HDPE and cost $360 Shipped. You can build the carriages yourself with some templates and a router, but this can be time consuming and results will very.
Total cost is hard to place as the builds very so much. I’d ballpark it at around $4,000 for a basic machine and with you suppling the tools.
If you’re thinking about building your own CNC router table I would certainly consider building a Joe’s CNC. The build is well documented and vendors are familiar with the build.
Here’s a video from Joe’s own YouTube channel: