1. I'm vegan
2. I don't eat wheat
3. "Outlet" baked goods?
We have a bread outlet nearby; basically, you buy bread direct from a factory store instead of an intermediary (that intermediary being the grocery store) at a deep discount. When we're really poor we can live on 1-dollar loaves of bread, eggs, and the cheapest margarine money can buy.
Also I don't know how you can make the vegan step when you also have some kind of wheat allergy, but hey, your life, not mine. If you get poor enough to cheat, though, eggs are god damn cheap.
I guess if you're vegan you could probably do huge pots of bean soup and vegetarian chili. Lentils are always absurdly cheap, we lived on bean soups and eggs for a while because we were so broke. I usually used beef and chicken stock, but vegetable stock or broth would work too. If your allergy is specifically wheat and not gluten, you might consider going to an asian or indian market and buying rice bulk. Rice keeps forever and a 20 pound bag of rice will last you for a long god damn time, even if you eat rice with every meal.