White Label Panel
This is my suggestion before you made it live but you can consider this as a part for the next update of your panel and expend your business wide in future too.
Why not you include with White Label features for hosting company, web designer, agency to resell your products? At the same time, maybe you can put this features as below just for White Label customer only.
1. Billing System
2. Collaboration (Suitable for agency or web designer)
3. Ticket and Support
4. Control Panel Management
5. Easily Deploy Hosting
6. Set own branding, pricing and offerings