Mesh WiFi is a poor choice unless you have no other option. If you live in a home that’s wired for cable, but not Ethernet, you can hardwire routers over coaxial (via MoCA) and have a rock-solid network that’s not based on WiFi reception between nodes.
Also, are you going to stick everyone in the building on the same public IP, without access to a routeable IP, and with you implementing their “parental controls?” Great if you want to snoop on your tenants and control them, not so great for the tenants.