Overestimating the cost of Iraq?

Republicans Seek Retraction of Report on Wars' 'Hidden Costs'

There are many unrecorded costs of the war in Iraq and it's piling up. The Bush administration grossly underestimated the cost of the war and when some Democrats put in their numbers which could possibly be on the high side (though I think in the end they won't be) the Republicans are all up in arms about it. Your cost of the Iraq war is somewhere around $20,000 per household.

Honestly, I'd rather see estimates on the high side that come in lower, than gross underestimates of the total costs. Those numbers of course don't take into consideration the price the soldiers themselves have paid.