Hmmm, I see no problems with that, except at the very beginning. You could ask the breeder if they'd hang on to the pup until it was a bit older, and can "hold it" longer by the time it gets to your home. If they are a reputable breeder, they should have no problems with doing that.
I got Tysa when she was 5 weeks old (I know, terrible, and at the time I didn't know any better, plus I was told she was actually 6 1/2 weeks, but the dates on her health record for birth said 5 weeks). Anyway, my bf at the time and I were both on the same shift, so Tysa was left for 8 1/2 hours a day during the week by the time she was 10 weeks old. Luckily I got her just as I'd started my vacation time at work, and my bf had been at the company longer, so he got an extra 2 weeks.
She had accidents here and there in her crate for maybe the first month being left alone, but she was fine. I worked hard on training her whenever I was home, and she was just under 4 months before she starting being consistant in not having any accidents at all in the house, during the day or overnight.
To be honest, most people have to leave their dogs for a somewhat long period during the day, and the only time you really need to worry is when they are young and still potty training. I think if you had the breeder keep the pup till 10-12 weeks, with you being able to get home at lunch, even over a 15 minute period he/she will likely "go" during that time. Or if you can take some vacation time when you first bring the pup home, that'd work too. As long as you have patience, and understand that there can and will be accidents at first, you'll be fine.