You will be surprised at the different rates that exist from different rental companies. You may have to call every van rental and car dealership in your area. After careful consideration, I found that by taking the university's twenty-six cents a mile they pay for using your own car, I could pay for a brand new 15 passenger van and save the school a lot of money. With van payments less than half that amount everyone benefited. Over a 3 or 4 year time span, an individual member can accumulate enough points for a free flight.
Airlines also run specials.
We made one flight, with two plane changes which filled a promotional campaign criterion and we were awarded a free flight for each ticket which we held. Ask around and you might find you qualify. Most airlines also have a group discount desk for large groups. Thus, when an individual student leaves your program, the frequent flyer account stays with the team. If your campus has a student dining program for students in the residence halls, you can easily cut your food budget in half.