Below you'll find screenshots showing what your hosting company's management portal looks like to your customers.
Your customers will see your logo above the login and signup forms.
Once logged in, your customers can create new servers. Users are prompted to purchase a subscription in order to create a server. Once the user purchases a subscription, they can delete and recreate the server as needed without purchasing a new subscription. They'd only need to purchase a new subscription to add a second server to their account.
The user can create as many new sites on their server as their subscription allows. You control the maximum number of sites allowed for a subscription when you set your company's pricing.