Okay maybe I have some spare boxes so I can try a small monotub.

All monotub tutorials I found were strict about pressure cooking and used grains. I don't have access to manure, gypsum or other items plus I am extremely busy and having space just for that one big plastic box in the appartment.

I am pretty sure if I play with substrates and try to mix something without heving absolutely precise recipe, I will f**k up.

I haven't had my first flush yet so I will stick with what works so I get at least some fruits and then maybe play with monotubs.