The major (and only?) claim the author has in favor of starting a podcast is that listeners jump in to share free consultation.

I don't know. It doesn't seem like a good reason to start a podcast. But if you have the time and motivation to do a podcast, and make it a good podcast for your listeners, I guess it could be a nice side effect.

The better way to go at it would be to note down the problems beforehand, find an expert and plan an episode around them.