Hi April, I'm afraid I'm not a QF, but we are living on one income because I am disabled, so we often have to make do with very little money for food.
If you have things like Costco or Sam's Club in your area, you can buy staples in bulk and save money. You can also get toilet paper there and things like that.
We buy canned or frozen vegetables, beans, and rice and base a lot of meals around this, having soups and stews and stirfries for dinner. We do not buy any convenience foods (prepackaged, premade stuff), except as a treat occasionally. I drink water or juice from frozen concentrate.
You can do a lot of things with oatmeal and cream of wheat for breakfasts. Get a mix and make your own waffles with an iron or pancakes instead of buying them premade. Put granola with yogurt to make it more filling.
For my wife's lunch, I do some fruit and vegetables, rice, stirfried or curried chicken, and soup. She has a four part container (you can do this for your DH - look up Mr. Bento on Amazon; the food stays nice and hot all day) and I just fill it up. It seems very gourmet, but it costs much less than her buying a sandwich from the deli every day.
If you have a spare freezer, I have known people who bought half of a cow from a farmer and paid to have it processed by a butcher. If you go in with another family, it is even less expensive for you. The cost seemed like a lot at once, as a lump sum, but broke down to be quite cheap if you looked at how much you would have paid at the store for so much meat.
This page talks about it a little more, but you should be able to ask any butcher in your city about how to do it where you are:
http://www.oklahomafood.coop/buyingmeat.php
