If you haven't looked into it yet, GitHub Actions is relatively easy to setup for Unity builds and, for us, it cut build times more than in half (60+ min to ~20

If you haven't looked into it yet, GitHub Actions is relatively easy to setup for Unity builds and, for us, it cut build times more than in half (60+ min to ~20min). GHA isn't cheaper per minute, but it is much faster and you can output things like Code Coverage.