There are lots of ways to eat healthy on a budget. One thing you might do is read this Spark article. You don't have to break the bank to eat healthy. www.sparkpeople.com/resource/nutrition_art
Here are a couple of pieces of advice. When it comes to shopping for fresh fruit and veggies, buy what is in season and on sale. If you can't afford fresh, then try frozen. Frozen veggies are just as nutritious as fresh ones. Frozen spinach, broccoli, kale, corn, peas, blueberries, etc are all reasonably priced. Buy the "house" brand unless a brand name is on sale.
Beans, eat more beans. They are high in fiber and protein. Beans are extremely versatile.
While it's nice to eat organic, there's nothing wrong with eating conventional foods if you're on a budget. I buy store brands all the time to save. When certain items are on sale, I stock up.