Well in Picken's case the price of competing fossil fuels is not the immediate issue. It is the financial snafu, at least according to him. He can't finance the the full turbine buy plus transmission right now. Oil could go to $100 tomorrow and that wouldn't change his problem.
Everything was fine until the price of crude plumetted. One cannot obtain financing on alternatives that are not currently economically competitive.
His entire plan hinges on the assumption that natural gas is price competitive with petro.