Agree with all others have said re. mess etc even if they're non shedding. Also consider:
Training when you first get a dog and continuous training
Half term & longer school holidays
When you're ill but need to walk the dog, ditto if your DD ill
When you want a day out but dog can't be left longer than 4 hours
When you feel like a lie-in but dog doesn't
When you want a spontaneous weekend away you need dog sitter
When it's rainy, cold, hot, humid and dog wants a walk
When you're visiting relatives/friends but can't take the dog
Costs of dog, vet checks, vaccinations, dental, food and insurance
Your daughter will lose interest, not because she's an uncaring person, she's just young and the older the gets, the more interests she may have, she will have exams, parties, boyfriend/girlfriend, go away to uni or to work and the dog will still probably have another 10 years in him/her.
It's a huge commitment and not one to be taken lightly. Also, if you'e thinking about a specific 6 month old dog, why are they available? Is it from someone who bred him/her and wasn't able to sell? Why is that? Have they done all the specific health checks that a poodle needs, not just a general health check by a vet?