I am currently coaching an athlete that didn't make to worlds but I also use to coach another athlete while they were in high school and I am still close to her and her family so I considered going just to watch.
I will start you out with a gallon of unleaded 87 octane gas is between $6.50 and $7.00.
The hotel room was $400.00 a night at a Courtyard Marriot in Corvallis which is 45 minutes away from Eugene, I used airline points to get my ticket but it took 64000 of them on Southwest Airlines to fly into PDX and the rental car from Hertz looked like it was going to be around $2000.00.
So I figure I would've spent about $6000.00 dollars, twice as much as it cost to go to USA Champs, to just go watch someone perform. I wished her luck and said I would be cheering her on from the comfort of my living room.