Hey Ted,
Thanks for reaching out and for your interest in our software!
In regards to your question, at this time what you last suggested is unfortunately the case – you would have to set up the payment system as you describe it on your own.
We do not have features at this time that would allow for front-end posts from subscribers. You would have to use another plugin to handle the membership system. You could then limit access to the Community Events submission page so that only those with a paying membership are able to access it.
I’m sorry to disappoint but hope this information is clear and helps you move forward with your project. Let me know if that’s the case!
Sincerely,
George