The OP talks exclusively about the money Bush spent on the Iraq war but avoids talking about the lives lost and money spent by obama in Afghanistan in what he himself called, "the good war". Both figures dwarf lives lost and money spent by Bush in afghan.
"On July 7, 2011, U.S. troop deaths from the war in Afghanistan since President Obama took office reached 1,000. That means that nearly two-thirds of the U.S. fatalities in the war in Afghanistan have occurred during the Obama administration, which has managed the war for a mere quarter of its duration."
U.S. Deaths in Afghanistan: Obama vs Bush | Just Foreign Policy
“We can’t pay our bills here, yet we’re spending $8 billion a month in Afghanistan,” Mr. Jones said in a telephone interview. “I don’t know what our country is trying to accomplish. History says Afghanistan will never be a nation. It will be a country of tribes. We’re wearing out the troops and spending money we don’t have.”
A Motley Consensus on the Afghanistan Line Item - NYTimes.com
Obama always said that we are spending way too much; we're going to go line by line in the budget. And one of the only good promises he made was to save money on Iraq. That's how he was planning to support everyone from cradle to grave. It doesn't really add up that way, but at least he wanted to cut spending on something big.
"And he did cut the spending in Iraq. But the spending has gone up enormously in Afghanistan. Even adjusted for inflation, we see that, other than Bush's last two years with the surge, total spending was lower for most of the Bush term on the two wars."