My little world of commercial steel buildings
Metal is a lot less expensive than wood and concrete for instance, and the fact that they are mostly made at the factory before they are even shipped brings down the construction costs even further. The assembly line method of manufacturing the individual components of the metal buildings also serves to greatly reduce their costs. You could even buy metal buildings in high quality kit form, and simply put the various pieces together at the construction site. If you don't have a lot of time to spare for your construction project, metal buildings offer a time benefit as well, since most of the parts are already pre built at the factory. If you opt for a building made of concrete or wood, you are looking at a project that can last several months at the very least.