Self hosted podcast recording & RSS URL hosting

Using a public google I cal url to trigger recording to ffmpeg for each calendar event and make folder and recording each episode to that folder weekly. provide aq public URL RSS address for that folder so I can use on my website to feed podcast episodes, I have been able to make everything and its quite quick, but the issue im having is making podcast generator or Castopod public, I don't want to port forward as I wish to use the host machine at the studio. I had been using cloud flare and duck dns to create a tunnel but will need a permeant free one made.
60 second recording test once on boot. automatically boots script on power up. no port forwarding , use at any location .

Raspberry Pi3 with local external storage to host public mp3 from stream recording.

maybe 30-60 minutes work .
will provide remote log in on the Pi 3
Thank-you for your interest, possible regular monthly maintenance work plus small other projects if the first job works out well.