[gnicholas]

What's the value prop for founders and for investors? Is it strategy, funding, sales, something else?

Check out other similar networks. I was part of Founders Network for a while. See what their business model looks like to get a sense of what the market will bear (I think it's hundreds a year, plus more for events). And consider taking a very different approach, since the world is a very different place than when they launched over a decade ago.