You could get real simple and go 433 wireless:Right? I feel the urge to just build my own after staring at all the options for a couple days. But for $110 with everything, I feel pretty good about giving it a go. Then I can decide whether to build my own - with a better interface - some other time. 🤷♀️
There's better looking switches that mount on the wall that you could pair to it. NO WIRING AT ALL. These are battery powered. I used them in my RV.
433Mhz Wireless Light Switch RF Remote Control 86 Wall Panel Transmitter E6D2 | eBay