Relative, that is, to how taking-out-a-second-mortgage expensive it is to go to the average NFL game. After the jump, check out the infographic that explains how goddamn costly going to watch professional football has become, and why a Seahawks game remains a relative bargain.Budget Planner – Mint.comNot included in this calculation: Unlike a lot of NFL cities, Seattle also has the benefit of a downtown stadium. So as long as you’re not one of the suckers who pay $30 to park outside Qwest, you also save on transportation too.