Hey OP - I was a little harsh. And I apologize for that. I think I posted that before I had my coffee. And considering I gave up caffeine and don't drink coffee, I'm not sure why I am making that excuse.
I freely admit I tend to overreact when people ask for free work - no matter the scope. Personally, I find it disrespectful. Others find it elitist. Both viewpoints are certainly valid.
Most of the regular posters on this board are at least semi-professionals. And we're used to answering general and technical questions about design and various design programs. No one actively solicits design work on here. So when someone comes on asking for a "quick favor," some of us find it a little jarring.
You did make it clear that you're doing this as a hobby. You did make it clear that you are not in a position to compensate anyone for their design work. I appreciate that. But please understand that most of us here are not doing design work as a hobby, but rather as a profession to keep food on the table. Without offering a little something as an appreciation for the time spent working with you - even something small like a gift card - you're not going to find too many people eager to help.
In retrospect, we could probably be a bit nicer about telling you that though.
So. That being said, you might have better luck approaching students or interns. There may be some on this board willing to help. Unfortunately, I don't know where else to specifically point you to get you a logo with your lack of a budget.
Good luck with your project and podcast.