Here's where I find it difficult. I hope I don't sound too negative.
On the one hand, I'd like it if it was like the Archers, but for a long term thing you'd need someone senior in the BBC or whoever else you want to broadcast it to think "Hey, the listeners would like that!"
I'm not convinced that they'd do that, particularly at the moment.
An alternative that some people would use, would be to do it online, but you need someone who does that sort of thing and I've no connections.
On the other hand, if initially there was a one-off drama, which would act to test out audience reaction, and, if people liked it, act as a first episode, I think that might attract interest from people who'd make and broadcast a serial.
So maybe what's needed is a plot for a single drama, but some proposed, simple storylines for future episodes.