As I've worked with the installation and configurations of ISPConfig on ubuntu, whmcs and also worked with firewall configurations. I feel I could be the best person to continue the project.
I am working with ubuntu from last 6+ years. I am very expert with system management. You are asking me to install ISPConfig and WHMCS and OPNSENSE ! IT's a 3 different big things... Budget is 2Low... Let's talk more on chat...