btw aren't you in the UK?
If so, you should have cheaper access to the PCB's and get them made for like $5 or something SHIPPED.
After that, you can get all the components pretty cheaply from an electronics store or lying around in storage and make like 5 or 6 of these for the price of a fabricated one.
Such a great exercise for kids imo, even adults interested in electronics, mining, decentralization etc.
Love free open source!
