don't force the seafood if you don't want to. You can get chicken of all types, from thighs at ~$1.70 lb to boneless, skinless breasts at ~$4/lb. Ground beef is similarly cheap, and london broil/flank steak is both lean and cheap (~$4/lb). These are storecounter, not distributor prices. You might also want to investigate canned wild alaskan salmon, athough the frozen stuff might be better.
Just another student over here.
Oh, and the public has massive government subsidies on corn to thank for how crap food (which mostly comes from corn) costs less than healthy food.