Too Many Carbs

I have to agree with everyone else in that candy is high calorie, high carb, low nutrition, and isn't very filling. I'm not disgusted by your diet but I couldn't live on it.

As for changing, the only way to reduce your carbs without changing your foods is to reduce your portion sizes. But, you have a low calorie goal as it is. You really need a better selection of foods in order to lower carbs.

Some good cheap suggestions are tuna, eggs, mixed veggies (like california mix), broccoli, cabbage, canned mackerel, canned salmon (surprisingly cheap), bone-in chicken, etc.

When you remove from carb, you will need to add to protein or fat. Cheap protein from the above list or protein powder is good. Fat is also easy to add with olive oil, butter, cream, nuts (albeit can be expensive), cheese and many other things.

As a side note, I eat relatively low carb but also unprocessed. I eat on a middle-class budget though.