1 way to make your over engineered network even better

[mflannery]

To prevent unplugging your RPi from taking down your network, set up two RPis just like you did the first one. This way, if you unplug or update or reboot or do something that takes one down, the other will take over. Once you have set up the second RPI just like the first (but with a different IP address), just add that second DNS server IP address to your DHCP config so that your clients get two DNS server listed. If one doesn’t work your devices will use the second and your network should not ever go down (because of an accidentally unplugged RPi)...