Ugh I'd be happy even if it made 1-2$ a day per pc. Heck at $300/day who would argue that? So much wide spread info on the subject of mining. It's so hard to learn what's legit and what's bs.
Currently you'd need 1.62 TH/s to
gross $1 a day, excluding electricity and other costs. I can't think of any PC or GPU that can do that. A high-end server doing double SHA256 CPU mining can only manage a few hundred MH/s.