To some extent, this is also because our logistics is really centered around shipping containers, and anything significantly larger than that becomes a weird, specialized and expensive thing to transport, so it’s cheaper to do onsite.

(There was a bit of a movement to turn literal shipping containers into rooms or tiny homes, but it turns out it’s quite expensive to modify something that wasn’t supposed to be anything other than a box to have things like windows and doors and plumbing, to say nothing of whatever remediation would be required of the container’s previous life.)