Somewhat related, a few years ago I saw a video of a guy starting up a "live TV studio" from 70s/80s I think at his cottage/cabin. It was quite interesting, unfortunately not in English. I'll try to find it anyway and update this post.

edit: Here's the video I had in mind https://www.youtube.com/watch?v=51F7zNWqlgM I guess it's boring without understanding the audio :)

There's more on his channel