Hello and welcome to YT! I think you have found a great resource tool to learn about the Yorkie breed to help educate yourself about the financial commitment of owning ANY pet. In order for anyone to be a dog owner you need to be able to care for it appropriately after bringing him into your home.
Please stick around and absorb as much knowledge as you can to help you become adequately prepared to be a pet owner. It is unrealistic to purchase any breed puppy from a breeder for $100 and in post cases you can not even adopt from a shelter for that amount either. In addition, to adopt from a reputable rescue you need to have excellent vet and other references as well as being in a position to provide for them as a life time commitment.
I hope that the information that you have been given from your post will help to continue to educate yourself about pet ownership. There is so much to learn and prepare for before bring home a new member to your family. I'd like to encourage you to stick around and read and absorb all the knowledge that you can to make a well informed decision about the puppy that I can tell that you would so much love to own.
__________________ “Never argue with a fool, onlookers may not be able to tell the difference.”  Mark Twain |