aww congrats on your new baby
ive got 4 yorkies but i started off with a boy then got a girl who then decided they wanted a family (without asking me first lol) and along came 2 boy puppys which i kept as i couldnt part with them,so i know what it is like to have 2 puppys at the same time. first of all having 2 will make it a lot harder to train them as you dont know which one has left you the little wet patch somewhere a little wet patch shouldnt be
but i did find it a lot better for the puppys to have each other for company and as you say you work at least they would have each other, maybe the best thing you could do would be to get a older yorkie so its already trained and would keep the young pup company while you are at work not only that but the pup would learn things a lot quicker from the older dog, and as the pups so young a female would take care of it and replace its mother. there are so many dogs needing homes and if you rehomed one of them it would be better for the pup,the rescue yorkie and you.
so win win all round.