All fine suggestions, they just miss one important point - the production of biofuels will not follow your plan, but will be governed by "the market." Right now that means giant plantations of palm oil in SE Asia and sugarcane in Brazil, most of which is being planted at the expense of rainforest and productive food land.

Your suggestions all require some sort of planning and forethought, not really the strength of our market based economy.

"The Market" knows all, sees all, and does right by all.

(just kidding.)