Looking for an affordable (DIY) CNC machine

Hi all,

I am looking for an affordable CNC machine. Commercial machines and kits remain a huge cost when you don’t have access to a fablab or somebody who can do it for you in your area.
Did someone test the Maslow CNC or have an opinion on it? Or are there open-source plans for self-building a CNC machine that would be suitable to make Wiki House elements at the fraction of the cost of a commercial one?
I’ve seen what looks like a self-build CNC machine with a plywood frame in Alastair Parvin’s presentation on Ted Talk. Is this an existing machine or just a 3D model?

Thanks in advance for your feedback!