You're missing "apartment complex" - you as the service provider contract with the apartment management company to basically cover your costs, and they handle the day-to-day along with running the apartment building.
Done right, it'll be cheaper for them (they can advertise "high speed internet included!" or whatever) and you won't have much to do assuming everything on your end just works.
The days where small ISPs provided things like email, web hosting, etc, are long gone; you're just providing a DHCP IP and potentially not even that if you roll out carrier-grade NAT.
I feel like this would open up the company to too much liability. Too many of your apartment users are torrenting/streaming/ too many DMCA filings to deal with when my main business is "hypothetically" being a top 3 nation wide payroll provider.
Done right, it'll be cheaper for them (they can advertise "high speed internet included!" or whatever) and you won't have much to do assuming everything on your end just works.
The days where small ISPs provided things like email, web hosting, etc, are long gone; you're just providing a DHCP IP and potentially not even that if you roll out carrier-grade NAT.