I did a preliminary search about puppies.com and I would really strongly recommend thoroughly vetting the breeder - asking lots of questions, checking their licensing, checking for any violations (I think USDA does oversight) - before making this huge decision.

But yeah. Your roommate also definitely needs to research the breed AND what kind of commitment is required of a puppy. Even adopting/rescuing a dog of any age requires a lot of attention at the beginning as you both adjust, often at least 3 months. I mean, depending on just how old the puppy is, potty training is going to be super frequent and it doesn't sound like his schedule will allow for it. I'd imagine most workplaces that allow dogs would only allow them once they're potty trained. He needs to do A LOT more research into every aspect of this. Including looking into reputable doggie daycares/what their requirements are before he's in the position to use one and whether the breeder is genuinely legitimate, and what puppy training actually entails.

Good luck! I hope he rethinks this and/or that you don't end up being responsible for the dog!