Hardware based print monitor

Hello,

I run a small real estate office with approx 15 agents. We provide 3 computers and printers for the agents to use, but many bring in their own laptops and request to have network access to the printers. I'm looking to consolidate the printers at my office into one, maybe two high yield printers that would be shared through the entire office. However, I would like to have the ability to monitor how much each user is printing so I may ward off any abuse.

This is where my problem comes in. I know I can monitor print usage via software, but I have no server to install said software on. As well, I have seen other software online that requires it to be installed on every computer that will use the printer. Since the agents are providing their own computers I do not want to install software on their personal machines.

Is there a hardware print server that I can use to connect a printer to our network that will monitor users and usage? maybe even allow me to set quotas?

Thank you.