I don't know if you meant she is being given a bird or is going to buy one.
I've raised cockatiels - but that was LONG ago. They are sweet birds. I used to take in rescues. They were normally more wild and didn't like human contact so we used them as breeders and hand-raised their young. I also had one that had been hand-raised and was a real sweetheart. He loved being with me, would even go to church with me (he'd hide under my sweater, on my shoulder). He never paid attention to the other birds in the house - just the humans. I don't think a second bird is absolutely needed - especially if you want a bird to imprint on your daughter as its' best friend.
Hand-raised babies are worth the extra cost. Other advice? Read everything you can find and you should be ok.