Elbow, I know this will be hard for some members on here to understand but I think it is time to turn her over to Rescue. I think you tried based on your different threads but you are at the end of your rope and the only kindess you could do for this dog is by letting Rescue fine her a new home.
Personally, I would think more of you for realizing this is not working out for you and your family and that you have some compassion for your dog. She is young enough to start over. I realize this can be hard but this is a dog that is alone a great deal of the day and now you want her to be alone all night. I have had many young families have to come to this painful decision but they knew they were doing the right thing for the dog.
Please I beg of you to call the Canadian Yorkie Rescue
http://www.canadianyorkshireterrierr...tr_contact.htm
Please feel free to PM me if you would like to talk about this