Pro sites integration with WHMCS

I see that I can provision a wordpress site through WHMCS, but how does that work if there are other add-on options?

Basically, I’m looking to offer a FREE simple site, a PRO site that has add-ons, advanced plugins, and a PROPLUS (that’s hosting, entirely separate from the WPMU through cPanel/WHMCS).

In addition for the WPMU I’d like to offer the domain name purchase/mapping, but I was going to charge an additional fee for that.

Is there any ability to get different TYPES of prices entered into WHMCS like a setup fee, or the ability to charge an additional monthly fee for a plugin/theme/etc.?