7 working onsite, 2 offsite, 2 onsite that are kept for fast replacement in case one of the previously mentioned 9 break.
Factory environment so one printer is not enough simply due to distance.
The above excludes our vinyl printer cutter combo's.
Also, we had a Nashua printer on contract, it sucked and the service and support sucked (several days without a printer each time it broke, and it broke plenty). Turned out cheaper in the long run to simply buy our own printers + backups and send them in for repair as needed.