A quick, affordable solution to escalating housing construction costs, Apis Cor’s 3D-printing system actually prints an entire small home out of concrete in under 24 hours. The SF-based start-up recently tested the process in Russia, delivering a 400-square-foot house. Of course, not all of it can be done through 3D-printing, and contractors finalize the structure by installing insulation, a roof, windows and a door—the latter two items being the most expensive. All-in-all this type of home costs about $10K. Structures like these can easily be useful in cities coping with a housing crises, uncontrollable cost increases or even areas afflicted with damages from a natural disaster.