A pound is acheivable if you can stave off mold. What you should do is stagger the jars. Inoculate the first 12 keep them in a very warm place this will help them colonize quickly. When those jars are almost colonized start another 12. Leave the cakes in the jars a week after they are totally colonized. After they start fruiting things will happen very quickly harvesting mushrooms daily.

As long as you can keep mold away you should get 2-3 OZ's from 12 jars. Where do you live in maine? ( not asking for an address just a general area ) I don't use AIM.