I'm a retired minister who's made the switch to online entrepreneur - and it's been made possible in a round-about way because of my podcasting. I have 4 shows now:
I began Christian Home and Family first - I'd retired from pastoral ministry but still had a lot to say regarding Christian family and home life. I had radio experience so a podcast was the way to go. That morphed into more podcast endeavors as well as a podcast production and show notes business that is my primary income these days.
The funding was not an issue - it's a minimal cost to get started. Time, I did my show in the evenings - from 8PM to 1 AM typically. That's when I first started, keeping my 9 to 5 job in place at the same time.
Podcasting has led me into podcast production, which is my main source of revenue. Our company now grosses over double six figures each year. I have NO sponsorships on any of my podcasts. I've met a tremendous amount of amazing people through my podcast efforts.
I use an ATR 2005 microphone - Audacity editing software - Libsyn for media hosting - Auphonic for post-production tweaks. I prepare a bullet point list of topic ideas in Trello, record episodes I've selected out of that list, then create show notes. I typically connect with any guests using Cleanfeed.net or Zencastr.com.
All of my shows are in all of the major directories. I promote primarily on social media though I'm exploring other options.
Create a content map first to see if you have enough to say about your topic of interest. Do you know enough people to invite on as guests - OR are you willing to reach out to those who could be guests?