It's a fun project, but alot goes into it.
Fungi is weird..the more effort you put into it the more that can go wrong.. but the return is unlike any vegetable.
Perfectly balanced, some wood loving species can grow 20 percent of the substrate weight in fruit. I mean if you cN image 20 percent of an oak trees weight in mushrooms.. it's quite amazing.
But that requires, sterile procedures, perfect mixes, growing rooms, clean growing rooms.
We spend our lives trying inhibits molds from growing. So it takes a little getting used to.
There are Mid Range ways to grow fungi too. That aren't so lavor intensive or prone to failure. Strawbale growing looks really good. Strawbag is really messy, but a little more forgiving.
Personally, I found some baby chanterelles this year. If I find them again I'm going to make a slurry with the fruit. Chanterelles are mycorhizal meaning they need a living tree for symbiosis. slurries are 5 gallons buckets with a sweetener, toss in a few fresh mushrooms and you've made 5 gallons of inoculate. To splash around tree roots. Morels, are like this, so are the famous red cap hallucinogens.
But keep in mind some fungi are straight up parasitic. Chicken of the woods, honey.. they will kill trees. Something to keep in mind when you grow trees