We have had ethanol available at the pumps in my area for many years (central Illinois) and it's cheaper because of federal subsidies.
Look to the future, hopefully run by conservatives. Increased ethanol use vastly increases the demand for corn. Farmers produce as much corn as they can, but because of the high demand they can get good prices for it. The corn subsidy dies. This larger-scale ethanol system becomes self-sufficient (profitable) and no longer requires federal money to exist.
This can be a winning formula in the end, if the government pulls out of everything as soon as possible.