Not saying it doesn't come with downsides and the hassle of maintenance, but at home I have a Linux server (running a Windows VM) + Mac Mini + Forgejo + Forgejo workers on each one of them. With NixOS it was relatively painless to get setup correctly, everything in a reproducible manner, and now I can have a ~10 line YAML file that adds cross-platform builds+signing+publishing when needed, and performance is much better than the free/cheap CI workers you get from Microsoft and others.

Last time I looked into self hosting Windows CI, it seemed like everything kind of expected you to install all your tools ahead of time, rather than anything containerised. I assume Nix helps with that? Are there any docs you can point me at?

https://github.com/highpost/forgejo-appliance