Specialized subscription solution needed for distance learning resource

I’ve got a complicated page that realistically imitates programmable stage lighting in a theatre. It is for teachers of stagecraft and theatre technology. It is all javascript and php right now, with no database. I would like to embed it in a simple Wordpress site and install a paid subscription plugin to manage different types of access.

  • I would like to allow schools to subscribe once with one lump sum, and thereby grant access to everyone using their domain in their email.
  • Alternately, I could also settle for being able to grant perhaps twenty login permissions by processing a single payment.

I see many paid subscription solutions available. Can anyone tell me if there is one that can be tailored to suit this need?