This is a painted mural, not a quilt pattern. I would not do this in a quilt. Wait until she picks out a reasonable quilt pattern. This is a project that can take years and hundreds of dollars to make. Just searching for the right fabrics will require hours of time and gas at $$$. I think she is asking too much of you. What/where does she plan to use this quilt?
I love my sister too, but this is way over sister obligations.
