FWIW, milo is reported to be high in anti nutrients, and can actually be toxic if harvested during drought, and possibly very cold weather. Do a little research on that. That being said, I grew some: It was red broom corn, and the birds loved it. It didn't kill them! I would grow some of the same veggies you enjoy, and give the surplus to them. In the fall, birds love to eat slushy pumpkins and squash. Zucchini are an other hit.
Deep litter in the run will also cut your feed bill b/c it will attract lots of beneficial insects and worms. It will also keep pathogens in check, and give the birds healthier gut flora, thus improving your feed conversion rate.
An other diet benefit is fermented feed. That will also improve feed conversion. The fermentation process actually produces Lysine, Methionine, and B vitamins.
I would love to try wheat and barley. But, have not done so yet.
Can you dedicate some land to edible ornamentals, fruit trees and the like?
If you have not yet viewed it, do a google search for the "Back to Eden" video.
Black Soldier Fly Larvae might be a winner for you as well.