i agree with what every1 has said, but would just like to include BEANS!
They are cheap and healthy. The most economical form you can buy are dry beans. You just soak them overnight and cook as usual. My favorite kind are lentils. You buy them dry in a bag but can cook them immediately.
You can also buy canned beans which are usu a little over a $1 a can.
What Vito said about calories in/calories out is absolutely correct. You can lose weight eating exactly what you are already consuming by reducing your portion. Certain foods may make you feel more filled/satiated but weight loss is all about calorie consumption and expenditure.
I live in Alabama. My family's income is mostly earned during November and December. We normally stock up on meat in January and that lasts us through September. Well, our area was very close to the parts of AL hit by the tornadoes. Our area was without power (and ice) for days. All exits were either blocked by fallen trees or the national guard. Our meat reserves of course spoiled. We have lived for months without hardly any meat and gotta say, it has remained a healthy diet by having beans and the vegetables grown by my family.
Btw, if you like rice white is cheaper, however I feel like brown rice is more filling so I tend to justify such a purchase. Oatmeal, grits, and cornmeal can really stretch a food budget too.
Good luck! Remember, ya dont have to have a big budget to eat 4 weight loss. Please let us know if you have any questions or need of recipes