In truth as long as the basic cleaning & anti contamination criteria is meet a real world engine build can be carried almost anywhere. Often we see images of various race teams re-building engines under desert tarps, in the back of vans ets. Home build enthusiasts often use spare rooms, kitchens, even the front room besides sheds, lofts & disused caravans, just my experience. Iv attached a 5 minute film of a 2008 ZX10R engine build in a basic but adequate workshop, all the rules of the build are clearly followed & although the terry towels & dark dingie facilities hint at sams cowboys it is in fact a thoroughly well done job. If you can see a mistake in the build process please share.