I was thinking about the problem with introducing it onto the sawlog. I don't think it would be much of a problem unless you left the log lay for a long period of time. If you saw the log up, then the lumber would dry out to a point where the mushrooms couldn't survive.
I also don't know how much of it would take on the heartwood. That is usually more resistant to rot, ie fungus.
The local markets are good sources for mushrooms. A lot of the different species can only be grown in woods conditions. Something like good ginseng. I've seen them in stores in the $4-5/lb range. That should mean you could get $2/lb for growing and harvesting.
There is a guy in Oregon that claims he can make more money growing truffles than he can growing timber. He's talking upwards of $300/lb. The European black truffle goes upwards of $500/lb and can only grow in oak forests. One guy in the Carolinas claims you can grow them here.
The Oregon white truffle can be innoculated onto the tree roots of seedlings. They have found that these trees have grown much faster than those that are not innoculated.
I think it can be good income source especially when doing TSI where a lot of the wood is cut and let lay. There are also all those tops after a timbering job.
