Well I think its a great thing that you have come here to ask questions! She (and you) can get a lot here - from what to "look for when choosing an AKC yorkie" to advice when they don't feel well to potty training to just plain bragging about how yours is the cutest!
Maybe if and when you really look for a puppy, you might start with some of the breeders here.
As for moving to a new home and not wanting the dog to "soil" your new place...they are tiny enough to gate off, say your kitchen area to keep them from your carpet. At least while you are training and if need be while you're not home. I think "most" of us use potty pads for indoor use so I would suggest those for potty training.
Is doggie daycare an option? or maybe at least coming home for lunch or having someone come by in the middle of the day? Alot of people have to work...just life, and these little guys survive. But I'm sure any dog would rather have your company. One of mine has anxiety seperation when I'm not there
We are gone often I'd say...but I started taking Vixxen with me everywhere I could in her carrier. Movies, short errands, even dinners...I know some don't agree but I do "sneak" her in with her carrier. I travel with her, car and airplane. I do feel guilty if I have to leave her home, especially if its for too long.
I have spent thousands on my babies....vets and grooming! We also have big dogs and have never had to spend a portion of the same money on them! Smaller dogs, yorkies, have tiny little, sensitive systems and you can't afford to just "wait and hope it goes away." They often need to go in right away, sometimes making that an ER visit! $$$
So...pee pads, quality food, grooming (weather long or short coat, unless you do it yourself), vet bills (unexpected and routine), teeth cleanings (these little guys tend to get food build up and need their teeth brushed/cleaned), extra money for airline tickets and hotel stays (if you take them everywhere), not to mention the fun stuff...clothes and beds and leashes and bows....lol.....that is just some of the expense you can expect.