>>1763785The 50$ figure is assuming you have access to hole saws aready and all that stuff but you might be able to make do with an exacto knife if you're careful
Pic related is what my box looked like before I bolted and siliconed the air filter unit to the side, it's the only pic of it I have. I got started by buying a little bag of oyster substrate as part of a coffee cultivator kit but I've multiplied it many times over by now and have a sterile agar slant in reserve in my fridge in case anything goes wrong.
