The gluten free diet can be pricey, but there are ways to cut cost. Some surprising places you might not think to shop are Costco and Big Lots which offer great prices. I make about 2 Costco trips a month to stock up on some staples. Here is the loot from my last trip, including Cashew Nut Clusters (im addicted), Chobani Yogurt for 12 pack , Healthy Gatherings Crunch Master crackers, organic spring mix lettuce, Maranatha's almond butter, and peach and mango salsa.
Some other gluten free options at costco include fresh meat, hummus, fresh produce, canned chicken, canned tuna, frozen fish fillets, Larabars, Riceworks rice chips, and nuts.
Big Lots is another store that I was surprised to find low prices on great organic gluten free cereal. They have Nature's Path crispy rice, mesa sunrise, corn flakes, and envirokidz cereals for $2 a box, with a retail price of $4.99 a box. So I would recommend checking warehouse and discount stores for great deals like this to help stretch the gluten free budget.