That sounds doable to me. I worked eight hours a day with all my puppies but I was able to come home on my lunch hour as well as have neighbors/family check in. But I had no life outside of work and dog...LOL.
With me being gone eight hours a day, I spent the rest of my waking hours with the dog...socialization, training, play. I was a stranger to my family for the first year or so. It was a lot of work and sacrifices had to be made, but I wouldn't have changed it for anything.