Fortunately, i have not used psilocybin mushrooms as medication.
I saw a documentary about a family father living with cluster-headaches, who had resorted to psilocybin after tons of government-approved drugs that either didn't work, or had too severe side-effects.
The fact that he could grow the mushrooms himself, although illegally, to a tenth of the price of government-medication and had next to none side-effects, except for the 4-6 hours trip he would have to endure, really made an impression on me.
That documentary sounds very familiar, I may have seen the same one or at least something similar. It was really inspiring to see the difference in his well-being after coming down from the trip, and as you pointed out, the price was practically pennies!