Schill93 - I hate that quilting has gotten so expensive for you. It can definitely be costly. But as others have said, there are alternatives that will allow you to keep quilting.
When shopping for backings, I don't always go matching. I like bright colors on the back of my quilts and shop at MDG for wide backings. They are very reasonably priced.
Another alternative to having your quilt quilted would be to use a local person who has a long arm at home and quilts for others. They are usually much cheaper than a quilt store. May not be as perfect, but will be done more affordably.