She will likely be A LOT more work then Tobey was but it can be done... it will take a lot of patience and work... she has had 5 years now to do whatever she wants, go potty wherever she wants etc. So she needs time to unlearn these behaviors. Dont go into this thinking it will be easy, but if you think you have the time and patience to devote to her, I am sure it would be rewarding.
Good Luck with whatever decision you make.