WHMCS server module for modern virtualization (LXC/LXD/KVM)?

Hello,

I am using built-in HyperVM server WHMCS module to create VPSs (virtual private servers), but now i want to offer WHMCS client a virtual private servers not based on OpenVZ but based on LXC/LXD and or on KVM.

I do not want to rent virtualization control panel like SolusVM as it is too expensive for me. I am thinking about Virtualizor ($9 monthly) and Proxmox (free), but i am unsure if they support kind of virtualization i mentioned and also have good WHMCS module that is affordable (one time payment of like up to $20 or up to $2 monthly).

Do you advise other combo (virtualization control panel x WHMCS module) so i pay one time affordable payment or maximum like $9 monthly for both (panel,module)? I want self hosted solution, probably not something like Virtkick who host billing panel themself for you. The best would be if solution can be based on high available cluster of 2(preferably) or 3 dedicated servers. (OpenNebula, OpenStack - i have not found control panel and simple setup).

Would be good if it is not required to have vLAN/IP subnet, just stand alone IPs and it would work to be auto assigned to VPSs.

Thank You in advance for the help.

I am using Virtualizor and its perfect. Ofcourse, maybe its not the cheapest, but its cheap.

Proxmox is also great & opensource. But: there is only one Proxmox Module, where proxmox said "we recommend the module", and its 99$ per Year.

So, if you want a good Solution, go with Virtualizor i think. The Support is great, everything is working fine.

(and Sorry for Bad english)