High Availability and Zulu Licenses

We are considering buying 300 Zulu licenses, and the 1000 licence pack is cheaper than 15x20.
When purchasing 1000 licenses, is it possible to distribute them evenly on two HA servers, so 500 on this server, 500 on the other?

No 1000 user license is for a single PBX. You can not split it as the license is tied to the hardware.