I hear this over and over again. "I would love to eat healthier, but I can can't afford it." This infographic is pretty damn accurate. So all of you who think you can't do it... think again. If you use whole foods like in the bottom example you will be surprised at how far they stretch (and how good they make you feel).
Not to mention, when you eat healthier overall you get sick less which is another expense that people don't factor into the cost of food and living. Eating healthy now is way cheaper than having a chronic disease later on in life.