In all honesty, not trying to sound brutal, buuut...
My honest opnion is that you need to return Tucker to the breeder. Given his condition with seizures if nothing else, he NEEDS to be placed in a home where someone can be with him most if not ALL of the time. He in no way needs to be left on his own as much as he is. Realisitcally, your work schedule does not accomodate for a dog (or any age or breed) with special medical needs like this one has.
If you are set on a Yorkie, I would look for one that is a bit older, already trained, and then seriously getting two if they are going to be on their own some.