Instructors are paying (one off or plan) to be able to submit courses
2. Instructors are allowed a max number of students (depending on payment plan)
3. Each instructor can manually add students to his courses".
4. Instructor can manually decide on specific courses to specific students.
eg. Student A can access courses 1, 3, 4, 7
Student B can access courses 2, 4, 5, 6, 7, 9
etc.

I'm just the administrator of the website and all above happens automatically.

Please let me know which of the points above are (not) possible with WP Courseware.

Thanks.