http://voices.nationalgeographic.com/2013/03/20/concrete-canvas-goes-beyond-fast-deploying-shelters/ http://voices.nationalgeographic.com/2013/03/20/concrete-ca

http://voices.nationalgeographic.com/2013/03/20/concrete-canvas-goes-beyond-fast-deploying-shelters/ http://voices.nationalgeographic.com/2013/03/20/concrete-can... > A Concrete Canvas shelter would cost 15,000 to 20,000 pounds, in the U.K., for a one-off ($23,000 to $30,000), but the price steps down if you are buying volumes. My guess is that they're not interested in dealing with small-volume customers, and so for large volumes the prices descend to a much saner price. "Look at how much your government/military/refuge 'saves' when you buy 1000 of these!"...