The NFL is a cash cow and nothing makes that more evident than the soaring costs to build the newest NFL stadiums.  The past four stadiums to open were the Minnesota Vikings’ US Bank Stadium (watch timelapse here), the San Francisco 49ers’ Levi’s Stadium, the New York Jets/Giants’ MetLife Stadium, and the Dallas Cowboys’ AT&T Stadium.  All four surpassed $1 Billion in construction cost.  The first stadium to open after the Millennium was the Cincinnati Bengals’ Paul Brown Stadium, which only cost a miniscule (relatively) $455 million ($626 million in 2016 dollars) to build.  The oldest stadium still in use by any NFL team is the Oakland Raiders’ Coliseum, which was completed in 1966 and cost $25.5 million ($186 million in 2016 dollars).  That stadium also spent $200 million ($302 million in 2016 dollars) in renovations in 1995 and 1996.  As you can see, dollars spent on NFL stadiums have increased significantly in the past few decades and there’s no end in sight.