Hi! I was diagnosed with celiac last year and have been gluten free ever since. It is really hard in the beginning and was a budget buster at first. However, once you get to know the diet, what you can have and what brands are the best - it really gets much more manageable. One of the cheapest GF pastas is Tinkyada and it also tastes great (more expensive than regular pasta of course, but way cheaper than the $4+ brands). Another tip is to use
Amazon and buy things that you like in bulk (I buy Bakery on Main Granola and put it in ceral sometimes; I also like the Pecan Lara Bars; and I buy Pamela's baking mix - this is the best deal that I've found and you can use it for so much stuff - it makes really good pancakes!)
One other suggestion is to practice baking. I wasn't really a great baker, but I forced myself to learn and that helped a lot. I use Annalise Robert's Gluten Free Classics recipe book (the flour she recommends is expensive at first but I only have to buy it like 2x/yr and it's worth it for the superfine blend). The cookie recipe is really simple and makes a lot so you can always freeze it and have some on hand for unexpected company, etc. I also love that cornbread recipe (so simple!) and then I make turkey stuffing out of that (it comes out great and my family likes it better than regular stuffing). It also has a great pie crust recipe that really comes in handy. Tons of others too, but I would be lost if I hadn't had those to fall back on.
In the supermarket, I buy mostly stuff that is naturally gluten free (fruits, veggies, corn chips, meats without marinade, etc.). Mexican food is yummy and mostly gluten free (use white corn tortillas for quesadillas and corn tacos are great). Amy's makes good frozen meals which are expensive but so convenient to have in a pinch (the hardest thing is not being able to order a pizza on a moment's notice).
Hope some of that was helpful! Good luck w/ everything and I hope your DD starts feeling better ASAP
