This may sound weird but try eating 6 decent sized meals a day (every 2 to 2.5 hours)
Keep it between 350-450 calories and try to do an equal Protein and Carb match, and don't forget your fats... keep those at about 20% of your diet. (40% protein 40% carbs and 20% fats)
This diet will allow you to keep your hard earned muscle, while intake of fat will burn off at the gym, and not burn muscle.
If money is a problem, then say hello to microwave (I'm not a huge fan but w/e)
As far as carbs go, eat all the crakers and bread you want. Just keep it to the above ratio, and eat Whole Wheats/Grains and just don't carb up past 7:00pm
White bread and such might want to be considered for the meal following your workout, as they are faster digesting carbs.
Tuna
Peanut Butter
Chicken
Fish
Whole Wheats
Turkey
some Yogurts
Nuts
etc
If you have a Trader Joes by you, PM me and i'll get you a bullet proof shopping list (I work there)
peace