Basic membership and notebook collaboration

A family/non-business plan could be something like a basic €120 / year for the Manager of the plan, which would include, e.g., 5 additional users covered under that fee, and the possibility of adding additional users (maybe up to some maximum - 5 additional users would work for me, but maybe this could be more generous) for some additional fee (e.g., €12 per additional user), or some maximum storage limitation (e.g. 15 GB) which, if exceeded, would incur an upgrade fee requirement of some amount. Maybe there would be a way to monitor activity which, if excessive (e.g., most of the users being active more than 3 hours a day), might incur some additional fee. I am the most active user in the family Joplin collection - probably do 95 percent of everything. There are two other users who are a little more active. The remaining seven users have not ever been active (although I have added to their content on their behalf), even though they have had access since about February 2024. Also, it might be good if the Manager of the plan would be able to add and remove the members. Perhaps there could be different types of additional members - read-only and read-write - with the read-only ones costing less. Some of my users never want to add their own content - they want me to do it.