On opening day, I had two "nosebleed" seats in the upper deck. It was a beautiful day and I mainly went for the TBD tailgate. I stayed over on Saturday at the Motel 6, to see more friends, and all I wanted was a cheap place to crash.
Adding up the sum of two tickets, gas, tolls (only 160 mile round trip), food, beer, and parking, it was easily a $400 day (and night) for two people.
It was a wonderful time, do not get me wrong, but it was CHEAP for me compared to folks from WAY out of town. Please note I bought no food or drink inside the stadium. I also bought no souvenirs.
I do not know how the regular fan with a couple of kids could cover this very often, if at all.