i say free as there are already (if you done some basic research) MANY campus restaurants that take bitcoin.
http://www.foodler.com/serviceArea.do;
just click on the city. then on the right side it will say Campuses
take washington DC. for instance http://www.foodler.com/DC.html
for the other cities that have universities but no campus listings, you could always google maps the addresses and find non campus restaurants that deliver to campus area's.
this should save ALOT of travelling to each city to have meetings with restaurant managers trying to convince them of bitcoin.
there. thats half your job done. now to work from that list to spread the word
This isn't to bad of an idea actually.