Build a small CNC Machine

I have been disabled for the last 20 years I am a creative person and love watching YouTube videos of CNC machining, so I went to my local library and found a book on how to build a small woodworking CNC machine that Id like to build. It would be something I can build wood carved signs and toys from plans from the internet and sell online. My plan is to learn the system and try to make some wood and plastic items so I can have a small income and save for my future. (Update:) I added a small pic of the type of unit I plan to build just so you can see what the machine will look like, The one I will build is made from aluminum and MDF which is the less costly version, but the motors and computer software to run the tools are the main cost.