If you are not going to send notes to another users outside the network nor planning to access notes via phone (Android, iOS etc, then, you only have to purchase 9 licenses (one-time payment) instead of using the yearly subscription.
In our order page: http://www.conceptworld.com/Notezilla/BuyNow , you will notice that there are 2 options. Cloud and Non-Cloud options. You can choose Non-Cloud option which is a one-time payment for Notezilla version 8.
Here's a short video on how this feature works: