I won't mince words: you're asking customers to outsource the core pieces of their business (netops, backhaul, billing) that they should be competent in, which puts them in a precarious position if you exhaust your runway, decide to move on to another venture, or are acquired by a less-than-ideal org.
Full disclosure: Muncipal/coop broadband proponent.
Also, big shout out to Graham (the author of startyourownisp.com). We met, and he's super knowledgeable. I encourage anyone interested to read his guide, it's very good. We don't see our offerings as directly competitive, and share a common goal of increasing connectivity.
An alternative way to look at this is it's a "white label franchise" business where someone not steeped in the technology can do what they know best, likely acquiring and keeping customers. I don't know if it will work, but I'm interested to see.
> Full disclosure: Muncipal/coop broadband proponent.
Something like this could probably accelerate municipal, coop, and piggyback (e.g. local water district or other small, independent utility) to take advantage of local infrastructure without having to acquire skills in a completely new domain.
Worst case scenario, the core gets gutted and replaced.