Renewable oyster colony?

I'm thinking of trying something, and I was wondering if anyone has ever tried it.

So say I inoculated a bunch of coffee grounds with oyster mushroom mycelium. Could I both continue to feed the colony whenever I made more coffee and also take some of the mycelium every now and then and put it in a bag/bucket to fruit it? I'm thinking of something like a sourdough culture...you feed it and you take from it, and the culture lives on all the while. Any thoughts?

I have tried it. The commercial mushroom growers of course can do that.  I have been able to stretch out the time it fruits but not make it everlasting so far.
JohN S
PDX OR

I've done it for 3 yrs with king stropharia on hardwood sawdust. I've spread my original beds to all the mulch under my trees and bushes and continued to keep them producing with fresh sawdust added every spring.

Yes, I think it's more doable outdoors with King Stropharia.
John S
PDX OR