The case is 3D printed on what appears to be a $160 Monoprice Mini Delta. Soldering was done in a reflow oven, commercial units start at around $200 or you can

The case is 3D printed on what appears to be a $160 Monoprice Mini Delta. Soldering was done in a reflow oven, commercial units start at around $200 or you can use a modified toaster oven. This board doesn't look too terrible to do with an iron or hot air gun either. You can get a decent combo hot air/iron station for about $60. You'll want some test equipment, cheap multimeters start at free from harbor freight but you'll probably at least want to step up to a ~$15 model. Logic analyzers are handy and until fairly recently were quite expensive but now you can get them for $10. An oscilloscope might be handy for debugging the power circuitry here, you can get a cheap one for $20 or a nice one for a few hundred or an old nice one for about a hundred. An adjustable bench power supply isn't really necessary but nice to have, those start around $50. A professional EE's workbench will probably have many thousands of dollars worth of equipment on it but most hobbyists have much more modest budgets.