I love DIY but sometimes it's just not worth it.
I can buy mushroom plugs for about $60 here in Australia. Or I can buy a bag of mushroom
compost for about $10 and grow mushrooms from it to collect spawn. Or I could buy mushrooms from the supermarket and try collect spawn from it.
I'm willing to pay $60 if it's a lot easier and more reliable. I have a perfect spot in my yard where wild mushrooms cover an old tree stump every year as it gets no sunshine, has lots of plants/weeds, and rains all winter.
Strangely, it's very hard to find information on how to collect mushroom spawn from a mushroom, and some of it is downright wrong (just watched a youtube demo and the guy concludes "I don't know if this'll work" without any follow up).