It is good that you are taking this so seriously and taking your time to decide on a pup. I suppose I am cautious of breeders that have so many dogs. A good breeder has a long line of known parents and breeds for optimal health, temperament and breed perfection. I doubt if this breeder can do this with so many mixed colors etc. She seems to breed for looks and variety? I noticed some of the dams are below five pounds, and that is not good.
I agree that you should look carefully into health guarantees and check out the parents and lineage. I know you want a pet not a show dog, but these Yorkies are prone to certain health issues that can crop up more frequently in dogs of uncertain heritage.
Certainly I would see if Yorkiemom 1 here has any pups or could suggest a great breeder in the area.
Whatever you do, please do not get a pup from the internet without seeing the breeder's home and checking out health issues very carefully.
This search is hard, but patience and research will pay off
