Hi Iuval, good questions you have there! I will try to get to these in the order you asked them.
Firstly though, I really don’t have a supply of logs that I can use. What I have is an endless supply of brush alongside a fence line that needs trimming every 2-3 years. This brush is not really conducive to plugging, but I can run it through a chipper and make small mountains of wood chips.
I then spread these wood chips into garden beds and I inoculate with mushroom spawn, in my case, frequently using Wine Caps, but feel free to use others if you like.
As far avoiding lab dependence, yes, it is possible and it can be done using the spores as you mentioned. You could also harvest the mushroom but sever the “root mass”, pull it and replant its another spot.
But the easiest way is to either dig up some chips that have an active network of mycelium growing or simply add chips on top of those chips.
I will give one word of warning though. This can be a bit tricky to time. The fungi won’t push up a mushroom until it is starving, deprived of wood to consume. Adding new chips AFTER a mushroom flush may not give you the desired results.
I mostly grow mushrooms for the effects they have on my soil. I have a long-running thread HERE:
This details my fungal journey and I keep it updated. I have also included a link in the first entry to a page of other pages about growing mushrooms. If you are really interested, I suggest starting there.
I hope this helps. If I failed to address any point, please feel free to ask.