PowerBI Licenses/Accounts question

Hello,

We have developed different solutions for our clients and we want to migrate everything to PowerBI Platform.

Our main problem is that we need the ability to create accounts for our customers and manage their accounts (Also pay for their licenses as they will be charged for our service).

We don't know if we could create accounts for different domains than ours and also we don't know if the licensing model of PowerBI allows us to charge our customers for accessing PowerBI to view the Dashboards we developed for them.

Any help will be really appreciate as we are a bit confused about this