That would be fun. Maybe you could start a thread on it and everyone can contribute their shopping tricks and recipe ideas for eating on the cheap. 
At $3.50 a day my family of 6 would have had $18.00 a day to eat. $ 126.00 a week
$504 a month and $6048 a year for just food.
My Lord we all would be as fat as a prize winning heavy weight Hog at the country fair.
For hubby and I this comes to $6.00 a day, $42.00 a week and $168 per month. Just food mind you no soap, toilet paper or paper towels booze or cigarettes.
We can live on this quite well, a 5 pound beef roast can be cut into whole steaks, beef stew and stir fried beef rice. 3 main meals each week. A stewing chicken can make another 3 meals, chicken and dumplings, chicken sandwiches, chicken salad, you name it.
Pork Butt, or ham, another 3 meals and we can perhaps stretch it to 4 meals. Plus the bone makes great soups.
Potatoes are getting expensive so we eat allot of rice and dried beans are about .99 cents a pound much cheaper then the canned.
Canned beans if they are B&M are great with franks and plain old bread and butter.
In my family at dinner there was always bread and butter on the evening table, for Hubby's it was spaghetti, butter and cheese.
Summer is here, the sales of frozen and canned vegetables will start. 99 cents a pound for frozen and 3 for a dollar of the canned. We stock up, fill the freezer for winter on the frozen and the pantry with the canned.
When the kids were growing up, I would boil up a dozen egg and their breakfast would be a boiled egg, toast and jelly. Lunch they got in school and peanut butter and jelly at home for a snack. Dinners they had a heck of a lot of beans and rice, spaghetti, chicken hamburger, and ham, and garden vegetables------ they did not starve. Milk and ice cream all ways in the frige to eat when they choose to. Summer vacation they got to make their own sandwiches and My boys would eat the darnedest stuff. Peanut butter, baloney, pickles and mayo. GAG
I believe we took the kids to eat out every 4 years. Was a problem with not the money but trying to keep them seated and quiet.
My problem is that we spend more money feeding our cats, dog and birds then we do ourselves.
