Honestly, I don't think there is any breed suited for the life you describe. Ten hours at a stretch is a long time for a dog not to toilet (even for an adult), and a bored dog is usually a destructive and noisy dog.
"Teacup" is a marketing phrase phrase used by unethical breeders. And yes, they can have some serious health issues related to both their size and poor breeding overall.
"Teacup" is a marketing phrase phrase used by unethical breeders. And yes, they can have some serious health issues related to both their size and poor breeding overall.