Urgent WHM/cPanel CloudLinux WHMCS Setup

I have an active WHM / cPanel licence and a fresh server waiting for a full CloudLinux environment. I need everything configured today so that 1–5 sites can be dropped in and run smoothly without me having to touch the underlying stack again.

Scope of work
• Install and harden CloudLinux on the server, enable CageFS, LVE, and all common PHP selectors/extensions so each site can choose its own version.
• Finish WHM / cPanel tuning—nameservers, SMTP/Exim, firewall, backups, and security best practices—so the platform is production-ready.
• Deploy WHMCS, connect it to WHM/cPanel, and set up both the Billing and Support modules I selected (ticket desk, automated invoicing, recurring billing, cron, email piping).
• Test everything end-to-end: account creation from WHMCS, resource isolation per account, and sample ticket/billing flows.
• Hand over root credentials, WHM login, and a concise run-book so I can add or migrate my 1–5 sites immediately.

Acceptance
If a WordPress site installs from Softaculous, isolates to its own LVE, and a test invoice/ticket run flawlessly through WHMCS, the job is done.

Please be comfortable working at speed; I need this wrapped up in a single session.