Kathy took the words right out of my mouth, she will not be with you forever, and you certainly don't want to move again in a short period of time. It would be different if she were 6 or 12 or even 15. But she is grown, and the geographical change may be the best thing that happened to her.
If the outside is new, it may inspire her to change things on the inside as well.
Good luck to both of you!