Parent-post and child-post for contributors

Case scenario: a community of friends used to run a venue that eventually became a reference point for the city cultural life. After twenty years they want to recount that experience on an online platform.
They have a timeline of all the events that took place during a two year time. So every event could be a parent-post with a brief description, maybe a poster, then every community member should be able to contibute it’s own written memory (child-post), with pics gallery, video, whatevrr. The result would be an article starting with the parent-post and all the child posts afterwards. Comments at the end. Like this:

Title h2: Event #3 (the parent post)
content, by author1, meta etc.

–Title h3: contribution to Event #3 (is a child-post)
content, by author 2, meta etc.

–Title h3: other contribution to Event #3 (is a child-post)
content, by author 2, meta etc.

Comments to event #3

contributions can be added at any time by different registered users.
Top of the tops would be to have a “contribute” button that opens up a post editor ready to publish a child of the current parent post.

Q:Why don’t we use Parent/child pages?
A: we are currently exploring the idea, but pages have their own limitations.

Makes any sense?
Would that be crazy to implement as a plugin?