I live in rural Australia. Corrugated iron is everywhere, and I love it. It is durable, lasts a really long time, is easy to repurpose. I know an older gentleman here who built a really nice barn out of some repurposed corrugated iron roofing. I'm about to build a shed for a home office, and will use corrugated iron. It is cheap, easy to work with, comes in decent colors (e.g. the ColorBond brand in Australia), is strong without being overengineered. It's great stuff.