Hardest part was getting the CI to do the build. Azure will only runs one build at a time (without paying a lot of money) so builds now take 1/3 longer at 20 mins. I also think these builds are being done on an 486 in the corner of Steve Ballmers old office.
@grumpygamer I paid £96 each for 4 Dell Rack servers 10 years ago, and they served us reasonably well for our first projects. Especially for things scheduled to run over night I don't care if they run 20min or 10min.