I'm poor as crap, (full time student, living in johnson county, paying for school out of pocket while working an intern like job) and I can't really afford it, but I'm going anyways.
Do what we're doing. The tickets are the most expensive part of our bowl expenses.
Get a group of like 12 other poor college kids.(Of course make sure women are going, enough for a good time for the guys, but NOT enough to make it a bitching fest.) Rent an RV (or trailer with a truck to pull it.) Split the cost. (Not too expensive, only like $30 a person for us.)
What to bring: Lots of extra pillows and blankets(people will be sleeping on the floor of the RV,) do some hardcore grocery shopping(tailgating food included), bring the movies, video games, TV(obviously,) cards, and most importantly alcohol.(Careful with this one on the road though.)
We're spending a hell of a less, and although we're going to be CRAMMED into this thing (only sleeps like 6 in three beds, but we have floors and chairs, plus we can fit three into some of these beds

) but I bet we have more fun than the vast majority of people making this bowl trip. Crammed road trips with buddies for teh win.