What type of licensing is the best?

Question

Windows

There is a question about buying software for the following configuration:
4 servers
- Terminal server + 40 RDP Remote App clients (2CPU + 32Gb)
- MSSQL server (2CPU + 64Gb)
- Two hypervisors in a cluster (they have:
--- Two Domain controllers.
- -- File+Print+Antivirus server
--- Spare frozen MSSQL
My rough estimate is around 300,000 at best But I think there are some comprehensive licensing options for medium business
? I understand it is necessary:

For MSSQL:
-- Win Srv Standart 2012 (30,000r)
-- MSSQL (30,000r or 100,000r, I'm already confused about these types of licenses)
For the terminal:
-- Win Srv Standart (30,000r)
-- User licenses (3 500*35 =
122,500r) For servers on hypervisors:
DC: - win server Essentials * 2 (~20,000 * 2 = 40,000r)
File+print server+Antivir: win server Essentials (20,000r) [or is it still standard? ]

The prices are rough, +-15%. But according to my calculations, the amount of software comes out somewhere around 300,000. This is not counting the cost of transferring 40 clients from winXP to newer ones.
I am looking for more complex licensing solutions, but so far it seems to me that the mess is coming out. And a lot of questions with terminal licensing.
ps Thought about solutions on Linux. But maintenance and support of the Linux zoo will not cost such a frail penny.
z.s.s. As I understand it, Win Srv Datacenter allows you to stick as many Win servers as you like in the hypervisor?

Answer 1

> But the maintenance and support of the Linux zoo will not cost such a frail penny.
Do not save on competent system administrators. It's often cheaper to set up FreeBSD than buying a Win zoo.
But, the price of migration remains unknown, as far as the existing solution is nailed to MSSQL.