Nice, I also have an office in my backyard. Although its a ~100 year old brick structure that was originally staff quarters. Had to put a new roof on it, run power, fibre and install AC. Now its my office / data centre (yes I put a rack in a room I sit in...)

https://tuhat.net/@sbr/p/big-tech-sucks

The rack warms it in the winter so I don't need any extra cooling, and I run the AC in the summer.