Hi there   Yeah it can expensive I agree.  But if you make the items from scratch then you do save quite a bit of money.  You can buy the flours in bulk and bake a bunch of loaves of bread and freeze them.  There are many recipes on the Internet to help and just let me know if you would like me to give you some links.   Also yes unfortunately it is an all or nothing thing.  You might as well not do it if you cannot eliminate the wheat and gluten entirely.  But I suppose some say you could do the process gradually so your family gets used to things.  But if you wanted to see any benefits...yeah...all or nothing.    Hope this helps.  Thank you for your question.