Use a cheap sonoff WiFi switch. Flash it with Tasmota and then you have a webpage for that device to switch it on and off, set timers create rules. All on your lan and no cloud needed.
I have made some more progress. I have got the framing done and the walls up. I ended up cladding this in OSB. At a later stage I'm going to add cladding. Video uploaded:
https://bit.ly/4irMJwR
Next step is the roof.