I would begin by saying that biodigesters.... As I said earlier, a project like that is into the millions. Biodigesters are more involved than simply putting the manure into them and away you go. Feeding a biodigester is like feeding a cow. You have to be very specific. They require certain rations to work successfully.
For a farm, there is risk in doing that. We know what the benefits are, but first of all, it's a huge financial investment, and you sure hope that everything goes right with the digester.
Maybe you want to clarify part of your question there.