get a print server hub
By far, this is your best option. When connected by a print server, the printer can be centrally located anywhere in the building and not tethered to a host computer and eating up desk space. This allows everyone on your network to print without being dependent on a host system that must be up and running and connected.
Looks like Newegg has four
HOWEVER, you said 4000N
- that "n" means network so that printer should already have a built-in HP JetDirect print server installed. Look for an Ethernet port on the back - you may already be good to go.