Mostly residential customers. WISPs are mostly deploying in CBRS band (3.6Ghz) which is available for this explicitly. Check out Bai Cells for an example of the equipment being deployed: https://baicells.com
Yeah, pretty good idea. As mentioned up the thread I run a web site dedicated to this kind of thing: https://startyourownisp.com/ we're getting kind of deep in the thread but I'd be happy to chat further via email. I think it's on my profile or my contact info is on that site.