Eggs. Lots of eggs. very cheap source of protien and second only to whey protien. If you dont like broccoli learn to like it a lot, you need a multivitmin it only takes one missing nutrient to screw up the whole protien synthesis process. Other than that if you cant afford to eat in college then youquite possibly could be wasting your time but if I know college kids and I do we were very crafty on how to get our needs while on a very low budget. get creative. Pro Hormone like Androstenedrionee (sp) is basically sterroids in disguise) after it passes the liver the first time vuala' you now have sterroids.
All the rest of your body grows the same way as your chest does. You work it to death. You started off doing nothing but benching and you have always benched so your chest took off leaving the rest of you behind. Concentrate on growing the rest of your muscles and only concentrate on maintaining what you have on your chest and let things catch up.