Without enough investors to make the episode/content available for "free", someone has to pay for it in time and/or money.
A web presence is relatively inexpensive but the cost of the time and effort involved in planning, traveling, hunting, filming, editing, etc, is high.
On top of the cost, all of the extra headaches of video production can take the fun out of an enjoyable experience very quickly. If you have to pay out of your own pocket and dedicate the limited hours after work and on the weekends, most would expect a pay off at some point.
So someone has to pay to make it worth it. It can be investors, sponsors, or consumers. With our market being a small niche, investors and sponsors will be limited, and investors are going to want all their money back and more anyway. This leaves us with the consumer having to pay for the content. We all like free, so signing up to pay for unknown content isn't very likely. So if someone made the initial investment of time and money to produce enough quality material to establish their credibility, how much would you be willing to pay for a 20 minute episode broadcast/streamed over the internet?
If that number is high enough with enough volume, I don't think there would be too much difficulty in getting it started.
I would love to do it if it would pay enough