I assume you are talking about in fact user CALs when you say 'additional server license'. I don't think you can run two QV server on the same machine. I assume you got so called Named User CALs from your OEM supplier.
This would be appropriate for your setting (a Named user CAL can be used for editing, and you can lease a license from the server from your desktop client. So it's almost the same as a desktop license, but more flexible).