I've had a lot experience creating podcasts and I LOVE doing this so much more than writing blog posts. I took a lot of advice from Nathan Latka's process for creating a daily interview-based podcast.
We hired a VA to book freelancers for me to interview and we pay her on a per-booking basis. We also hired a local student that we've worked with before for our podcast editing. We also pay him on a per-episode basis. This way we have a clear cost per episode :)