Yes indeed, if one has a large amount of manure and a need to process it - you have a wonderful oppotunity.
http://articles.sfgate.com/2004-05-14/bay-area/17426549_1_methane-metering-straus-farms
ANd this article
http://www.nacaa.com/journal/index.php?jid=63
discusses the real costs and the impact of Grants and Subsidies. Well worth the short time to read.
The number in that last make me ill.
Our government is insane.