Bite the bullet and buy her some of the best
For the extra money and to get carbon, you will save in the long run. These arrows will last and if she ends up getting out of it you can always sell them and recoup your money or shoot them yourself. If you buy cheap arrows, you take a chance of making it tuffer on her to learn anyways and then you usually can't get rid of them. Food for thought , just a suggestion. You do what you want
For the extra money and to get carbon, you will save in the long run. These arrows will last and if she ends up getting out of it you can always sell them and recoup your money or shoot them yourself. If you buy cheap arrows, you take a chance of making it tuffer on her to learn anyways and then you usually can't get rid of them. Food for thought , just a suggestion. You do what you want