Own subnet for IPManager?

Question

Computer networks

Hello Experts!!!! I have 2 static external ip, router (router - tpl -link) Computer and my own server. You need to create your own subnet using a router so that the internal ip is available as external.
What does the support of these panels write to me.
you will need to purchase a subnet with "white" (public) IP addresses and place the server on an external network, without NAT.
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1) So I placed WMmanager without NAT with a "white" (public) IP on a clean machine of my server.
2) On the second machine where the router (router - tpl -link) marked out IPManager.
3) It remains to find or create a subnet in IPManager. And connect the two panels together.
It should work like this.
The client orders a virtual machine, in IPManager it issues a free ip in the range of networks, and this ip is assigned to the created virtual machine. In the future, the client can connect to his virtual machine via SSH - putty to upload something to the server.
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Since my ISP provides only the external ip address. And the block is only for legal entities under the contract. I tried to rent ip addresses of the subnet so it's too expensive and their ip addresses can only be used from their data center.