So pleased it's working out for your kitty Harley. Don't worry about her being nervous, all cats take time to adjust to new surroundings and especially other resident cats. It's normal for her to hide; she will settle quite quickly with a little help from your sister. Half an hour away you say? Well it could be worse. Of course you will miss her but you have plans for her future and that's looking pretty good now. Best of luck.

Sue - Purrshah-persians