Things like beans, quinoa, and brown rice, when bought in bulk, can be really cost effective and also very filling. Eggs are also cost-effective, although you said you're not a fan. As far as veggies go, fresh veggies can be expensive, but the frozen kind are just as healthy, and most supermarkets will have the large bags of frozen veggies on sale at least 2-3 times a month, so again, they can be very affordable (and are also really filling).
I have lots of idea, but honestly, I'm really confused from your post about what you actually DO eat, since you've stated that you don't eat fruit, dairy, some bread products, meat, and eggs. With a little clarification (by meat, did you mean all meat including fish and chicken, or just red meat? When you say "most" dairy, what's most? Have you ever tried almond milk and other almond-based faux-dairy products? Do you eat cereal? Do you eat oatmeal?), you'll probably get some more detailed responses.
Also, you can always search SparkRecipes by ingredient, so you can look up healthy recipes that include the things that you do eat pretty easily.
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