I'm heading down from KC on Friday with my friend (Chief's fan). Not coming back until Monday. Got a couple seats around the 40/50 yard line, but upper level. That was nearly $500 (over $100 was stupid fees). Easily could have got some quite a bit cheaper, but didn't want to go high up (these are towards the front of the upper level) or towards the end zone too much. Going cheap on the hotel (but a place I have experience with, so I know what to expect), though, so it's no big deal.
I don't pay for parking either. I park a little over a mile away. I can sacrifice 20 minutes to save $30-60 and get a little exercise in the process.
I don't eat or drink at the stadium either (unless my friend wants to buy me something).