T.F.
Be very careful...........NEVER pay any money to anyone. If they want you they will call you. A snapshot will be sufficient in the beginning. Don't go spend $ on a portfolio until you know is someone is interested.
I'm in TX and don't know any agencies in your area. I've modeled most of my life and my daughter has modeled as well.
It is not all fun and games....it is WORK. Expect a lot of rejection, to be called at times that are not convenient for you (middle of nap times, etc), etc
Make sure your child likes it....it is WORK and please put any and all $$$ made into your child's accounts for education, etc.
There are a lot of kids that are pushed....accept it if she does not like it.
Good luck.