If you are going to the same kind of HiveManager (online based or on premises based), then you won't need to purchase a new entitlement key, we'll be able to transfer your keys over for you when you are ready to make the move. If you are going from an online HiveManager to an on premises HiveManager (or vice versa), you will need to purchase new keys, as they have different prices and terms. There should be no extra costs for moving to HiveManager if you are staying on the same kind of platform.
This guide reviews the steps to take when migrating, for reference- https://thehivecommunity.aerohive.com/s/article/HiveManager-Classic-to-HiveManager-Migration-Guide
