cheap, fast housing for humans

"The Vulcan II builds walls and floors by squirting layers of concrete, and can finish a house in a day or less. Adding a conventional roof, windows, and utilities can be completed a day later."

https://www.fastcompany.com/90317441/there-will-soon-be-a-whole-community-made-of-these-ultra-low-cost-3d-printed-homes?