One cost your analysis excluded was price fluctuation.
(Over a Barrel: The Costs of U.S. Foreign Oil Dependence (Stanford Law Books)
“Uncertainty costs money,” says David Edwards of VantagePoint Venture Partners, and it is now the fossil fuels that have increasingly uncertain prices attached to them, and it is the renewables that have increasingly certain prices attached to them.
Center for American Progress in November 2007,
Our economy’s dependence on oil, independent of whether it is domestic or imported, contributes significantly to our vulnerability to price shocks….The oil market upheavals of the last 30 years (such as the 1973 Arab oil embargo) have cost the U.S. economy some $8 trillion.
Another missing cost was human lives:
The Environmental Protection Agency (EPA) ranked gasoline as the number one source of toxic emissions.
The Harvard School of Public Health attributed 70,000 deaths to these toxic emissions annually. Lives are shortened by an average of one to two years, according to research by the American Cancer Society and Harvard University.
In a 1999 report, the South Coast Air Quality Management District in Los Angeles concluded not only that mobile pollution sources are responsible for about 90% of the total cancer risk in the area
Its only going to get worse.
Inform Inc, Dec 10, 2008: “At current rates of use, more oil will be burned in the next 20 years than has been burned throughout all of human history”