I can leave my yorkie all day if needed. But I decided to have a dog walker come in and spend time with him as he loves the company.
As long as pee pads and fresh water is left out I don't see the issue.
I will warn you when I was trying to adopt Thumper and Boomer I was turned away from a lot of rescue groups because I work full time and they felt leaving a dog alone for 8 hours a day is cruel. I would not mention that you plan on leaving the dog for long periods of time. As I am trying to adopt another one again I put down on the application 4-6 hours per day and specifically indicate someone will come in for an hour each day to spend time with him.