How to build personal Vaultpress for multisite

Hi,

I own a multisite network and though to provide vaultpress functionality to my clients (blog owners). When I approach VaultPress they conveyed me that I have to buy subscription for each blog instead of a blanket subscription for my entire network ... which is very much irritating.

This forced me to look for alternative or just vaultpress functionality which I can manage in my backend and provide assistance to my clients whenever they need.

Any help ?