On my 'Food Card' in university I only ate two meals. I was too cheap to run out the food card, but I chose the highest caloric meals to sustain me. That was my balance.  Find a nice cheap snack to supplement your needs and use your dining card om shitty, high call stuff. Places like McDonald's or KFC are terrible (almost ethically) wrong, but can provide a great calorie/cost ratio. Find ways to buy other's meals for a cash return (buy smokes or alcohol for the minors). The fast food options at universities are a disgust display of capitalism, human lethargy and greed. find the best pathway you can to abuse it.  (I'm assuming you have a food limit, but maybe you don't. Sell your position to people who don't have that. "I'll buy your meal for $3!", Bring in homeless to exchange for money. This is very desperate and schemey, but the modern university hierarchies have forced it. Fight against what they enforce).