Unifi’s lite router seems pretty cheap. My current routers do allow scheduling the guest network, I think, but I need to be able to push a button when chores are finished, and that means unified management over three or four access points… something that most routers don’t do.
I ran ethernet in the crawl space to put in jacks and routers to handle the ground floor and yards, use moca network adapters to repurpose old coax to reach the 2nd floor, and still use powerline modems to reach a couple places (though less and less, as they suck). Should be easy for me to pop in 3-4 unifi routers and be happy.
I have undyingly happy that I used ethernet to reach the solar inverter. That is so much more reliable than wifi.
Regardless, vendors like Rachio have an obligation to fall back to a usable mode when internet to the house, or wifi to the device, are down. Buying devices like the Rachio should make us more resilient, not less.