

Serving audio files is pretty easy as long as you don’t have a million people trying to DL a new 5GB episode simultaneously.
I wonder if that could be rate limited with some mechanism when OP blows up?
I haven’t streamed audio to a server in a decades since I ran an internet radio station pre-napster. We were using ShoutCast servers paid for by IM Radio Networks (now defunct) then. All we had to do was pay for ASCAP/SEASAC,BMI, SOCAN etc license coverage. It wasn’t a podcast tho, but rather 24/7 broadcast. With few thousand people tuning in every day, we ate up some serious bandwidth I can tell you.
/end reminiscing

You could run FreshRSS on a RPi: https://pimylifeup.com/raspberry-pi-freshrss/
Then interface that with your network. Heck, you could probably go down to your local Goodwill or Computer Resell shop and pick up something.