This won’t appeal to everyone, but I found it interesting to get a peek into a podcast startup with numbers for the different expenses and streams of revenue. Bald Move produces a number of TV/movie related podcasts, has ad-supported and premium content, sells merchandise, has a forum with advertising, etc.
Part 1: https://www.youtube.com/watch?v=Yh97k7_xppo
Part 2: https://www.youtube.com/watch?v=buAxVIhu5LE
Spoilers: http://baldmove.com/help-save-bald-move/