I agree with what the others said, but just wanted to add that not only will you be supporting the BYB, you'll be telling your daughter that it's okay to take shortcuts when you really want something. Whatever you do will teach your daughter that's the way to handle things...
My first dog also came from a BYB, I got him on a 'special'. And I wish I could go back and do it differently. My 'purebred Yorkie' is 10lbs and extremely hard to handle. He's my dog and I love him (I'd never rehome him), but I regret getting a puppy from that BYB every single day.
Find a reputable breeder and show your daughter how to do the right thing. So that next time she makes this decision, she'll make the right one