I am a Linux admin have 8 years of experience in this field. I worked in webhosting industry and manage datacenter from remote. I went through all the requirements you mention and I can fully configure your master master Procmox VE. I give full server management support I will manage your Proxmox cloud on regular basis. I also have experience working on AWS cloud. To discuss more on this please send request on skype vinnie6669
I worked in the following areas.
* cPanel/WHM
* Plesk
* Webmin
* Website Panel
* Website migrations
* Installation and configurations of applications like Wordpress, Joomla, magento, etc
* Email server configuration and maintenance
* FTP and DNS service configurations
* Amazon web services like, EC2, S3, Route 53, VPC, RDS.
* Migration Specialist
*Postfix Mailserver with spf, dkim and IP rotation.
*Nagios Monitoring setup
*PCI Compliance
*FFMPEG server setup
*Imagemagick install.
*MySQL , MariaDB database administration
*DNS server and nameserver configuration
*SSL installation/Lets Encrypt
Please give me a chance to work with you. I am sure that you will be 100% satisfied
Update :-
I went through the WHMCS modules you mention and I can configure it on your cloud. I have already configure WHMCS many times same I can do for you.
Update :-
Please add me on skype vinnie6669 so we can discuss about this project.
Thanks
Vivek