As a vegan on a limited budget, this approximates many of my meals (though I could stand to eat more nuts and seeds and fewer grains), and I can attest that any day I eat roughly this mix of foods is a day I feel superbly healthy.

I would suggest replacing the low-fat dairy milk with a non-dairy alternative such as soy or almond milk. Although this would up the cost to $3.50ish/day, non-dairy milks are usually fortified with more calcium than dairy milk contains naturally, and are often fortified with B12 as well.