It might not be worth it to organize a big order nowadays, PCB fabrication is already super cheap. JLCPCB (and others, but I have the most experience with them) will do 5 boards for $2 + shipping and the first order gets free shipping. I've used this service for prototyping many times and had great experiences.

I had been planning to build almost the exact same thing as what the parent posted but had been putting it off because I didn't want to draw up a PCB, so this is perfect.