Can reseller accounts be set up the same as the main site?

Can a reseller account be set up on the same multisite that will enable them to have a sign up page and payment gateway to manage monthly payments such as on the main site?

I understand that WHMCS is not a good plugin and the support is separate from Premium. WPMU and is lacking so I’m not interested in using it.

I have ProSites setup and am pleased with how it works so would like to be able to offer that same set up to my customers so they can resell. Is this possible?

Thanks for your help – Jan