On the contrary, turn 2.4 way up, and only use one channel on one AP, not mesh. Then 3 homes can co-exist.
By contrast, for 5 GHz, turn it to minimum and use one AP per room with wired (Ethernet or MOCA not Powerline) backhaul, and ideally APs with smart DFS.
By contrast, for 5 GHz, turn it to minimum and use one AP per room with wired (Ethernet or MOCA not Powerline) backhaul, and ideally APs with smart DFS.