When I was in college we actually had a decent kitchen. And it was, of all things, in an all-guys dorm. Not that I ever used it, but here's a recipe that's fairly easy to make and can feed you for a week or feed you and about 4 friends for a night. You'll need:
1 10 pack of burrito-size tortillas
1 small package of cheese (I forget the exact size, but it should be the smallest they have at Albertson's) either Pepperjack or Cheddar, depends on your taste
1 bottle of mild/medium enchilada sauce
1 can of refried beans
1 8" pan to cook these in (use a glass one if available)
Preheat the oven to 350. Grate the cheese (or buy pre-grated). Spread out a little space though, since you'll need it. Apply the beans to the tortillas, but make sure you have enough for all of them. Add in enough cheese to cover the beans thinly. Cover the bottom of the pan with some of the sauce, preferrably enough to keep the enchiladas from sticking too much. Fold the tortilla shells in at the ends, then fold into thirds (hopefully you can visualize this
). Place the now-folded tortillas into the pan. Pour more of the sauce on top of the enchiladas (depends on how much you like, I usually use 3/4's of one of the tall skinny bottles). Then add the rest of the cheese on top. Pop it into the oven for 20-25 minutes or until cheese is melted all the way. I usually cook until I can smell it (preferrably not burning though). Don't try this method if you're congested...
Overall prep time: 20 minutes
Overall cost: Shouldn't run you more than $10 to $12. Now that's pretty reasonable in my book.