I would say educate yourself and go for it if you have the time to potty train and all.
Women have sex and have babies all the time who have yorkies, I will have two and if me and my BF choose to have a baby or two I wont get rid of the Yorkies nor will i say , wow we have yorkies, so we shouldn't have kids. Its unrealistic.
I would suggest that you simply visit breeders and familiarize yourself with the breed and actually see how small they are and what you up against. I don't see why your child cant grow up with a Yorkie as long as u know what your getting into |