I don't know about your first question, my Yorkie was a potty trained adult when I got him, and I only worked part time. Fast forward 4 years, I work full time and we seem to make it work. Kaji just naps while I'm away.
As for your second question, I did that when I first got Kaji. I lived in a condo off campus during the week, and at my parents' place on the weekend. When I was doing the same potty schedule in both places, he did fine. When I tried 2 different things (outside potty for condo, piddle pads at my parents' place) it was confusing for him.
__________________ Littlest JakJak 
We miss you Kaji  |