Training is ongoing and already handled by their budget and support costs are probably the same. This is pretty much just comparing the license cost. Edit: we

Training is ongoing and already handled by their budget and support costs are probably the same. This is pretty much just comparing the license cost. Edit: we have a client who has 2000 users and they have two people dedicated to managing just licensing and have to operate KMS servers etc. That should be factored into the cost as well.