That board looks fairly easy to reproduce for anyone with board making experience.

You don't really need a schematic for it. Those images define the circuit although a physical sample is always best without a schematic to be able to verify everything. A physical sample is also needed to correctly place the mounting holes and/or pin headers.

From the dimensions it doesn't look like it will be "cheap".

I think the biggest challenges are:

• Getting a physical sample.
• Verifying the circuit is correct and true to original.
• Verifying the mounting hole locations are correct and compatible.

I think your time frame (how quickly you want to be done with your project) will dictate which way you go in getting your machine working.