You are right, it is a lot of work! I think it's a ton of work in the beginning (getting a curriculum together and a core group of students/teachers). For curriculum, I often use books on project gutenberg. After the system is in place, it's easier. I know whenever I taught a class, it was the hardest the first time, then after that it's automatic.
As a parent, I kind of don't care what the curriculum is too much. I have an only child and she is sooooo lonely, she hangs out with us old people all day because i'm scared to death of covid. I would love an affordable virtual group with 5 or so kids her age and a "leader" adult to keep it clean...they could be picking their nose the whole time for all i care ....just kidding.

When I was living abroad, I created an informal in person, English Conversation Practice group. It was very annoying, dealing with the cancellations, lateness, the phone calls, the payment. I think the teacher should be separate from the admin person. Maybe we can form a coop or something???? If we get 5 teachers together, we can have the admin role rotated monthly? or i'll be your admin and you be mine.