I noticed there are people on here who eat 3 meals a day. Others on here might have different goals then them as I see some of you mention the 6 meal a day thing and bodybuilding. I am going to be an M1 next year and I have recently transformed my body eating clean food and lifting properly (about 70lbs gone in a year). I spent probably a lot more money eating clean than I did eating 3 meals or a day ( a lot of it junk ). A few thoughts/hopes of mine....
I'm going to continue making eating clean a priority as much as my budget allows me. For me and those wanting to add muscle or at least maintain it in college, getting enough protein is essential. I get anywhere from 180-220 grams of protein a day. This is expensive. I save as much money as possible by buying in bulk. I have costco membership waiting for me at the home of my future school which will help. Here are the proteins I usually buy.
Frozen Chicken
Eggs (5 dozen per box, I mostly eat the whites)
Big cans of tuna (I drain them and store them in tupperware for easy access)
Frozen fish (talapia, hoki, and salmon usually)
Whey protein (this stuff is pretty cheap if you buy it in bulk, ON whey in 10lbs bags is my norm)
Sometimes I also buy big tubs of cottage cheese and skim milk.
Getting enough calories for ones activity is also important so the rest is made up of fats and carbs. I get most of my fat from my meats and the rest from fish oil which has now become rather cheap since it is sooooo popular in the scientific community. This stuff seems to do everything good (partition nutritient, improve body comp, upregulate fat oxidation, not to mention the other cardiovascular and health benifits)
Carbs vary for me depending on whether I'm trying to gain weight or lose fat. I eat most of my carbs in the morning and around training and they come mainly from oatmeal and fruit (apples and bananas). When I'm trying to cut up I stick mainly to fruit with meals. I buy oatmeal in huge tubs and fruit in bulk when its in good shape and cheaper. Veggies like lettuce and brocoli are part of all my meals especially when carbs are being limited and I need some filler for sanity and appitite reasons. I buy 5lbs bags of frozen broccoli and iceburg lettuce heads.
Eating 6 meals a day is tough when in school so I don't obsess about it. I sometimes only afford 4 meals and just up my protein in each meal to make sure I'm getting enough. When I'm in class a protein shake with an apple is a convienient and quick way to get what I need without looking like a wierdo eating out of a tupperware container during lecture.
If cost of my food budget is harder in med school I'll adapt. There are ways to tweak ones diet and training to make the most out of ones financial and time situation. Switching to cheaper sources of protein is one (milk and eggs are by far the cheapest). Another is lowering training volume or cardio so that less cal are required to recover. These principles may seem excessive to some, but different goals are present here. Getting big requires sacrifice especially when medical school should be priority one.