most home routers are capable of hosting more than one access point, they are also capable of different VLANs and IP pools. You shouldn't need a second router.

most home routers are capable of hosting more than one access point, they are also capable of different VLANs and IP pools. You shouldn't need a second router. For your phone to control your TV you'll most likely need to punch a hole in your segregation to make avahi work. Also any app that controls any of your devices will most likely want a direct connection at some point Your printer is just as vulnerable as any IoT device. Yes its a good idea, but its really not simple to do in practice, unless you are used to running your own network. Also with the creeping rise of IPv6 you'll need to change how isolation is done again