I am not going to read the article because it seems that the argument is Illogical.
The cost of transporting soldiers to and from Iraq and shipping equipment like guns, tanks, and others.
Then their is also medical supplies for the 'tent hospitals' and the cost of treating soldiers and transporting the severly wounded to Hospitals in other conuntries that can care for the soldiers. Then there is the outpatient care for the Soldiers.
The cost of food, lodging, and basic necessities like bathing, using the bathroom, and drinking water. All that has to be maintained.
There are so many cost to mainting a fighting force in another country, it's like running a city, that I doubt this guy or the CBO will ever take the time to calculate everything.
Therefore this guys argument is false on all accounts. Especially since we will not no the true cost of the war until years later. When the Pentagon decides to tell us.