When retiree Adi Astl asked the city of Toronto to install stairs on a steep hill that leads to a local park, they claimed it would cost up to $150k to build. Many people had fallen down the slope, so Astl and a homeless man built them for just $550. The city quickly removed the stairs due to safety regulations, but they agreed to replace them within days- at a fraction of their originally estimated cost. Source Source 2
