To be clear, because of the circumstances mentioned in your note you are
surrendering your Yorkie. If you do not find anyone please consider contacting a rescue organization who will make sure that the Yorkie's new people are caring and capable of supporting him since he will go through a difficult time at first. Here is a reputable one.
United Yorkie Rescue - A 501(c)(3) Non-Profit Yorkshire Terrier Rescue Organization