Perth electrician Bill Simpson has started a 10-day stint living rough on the city's streets, with nothing but the clothes he is wearing. He aims to raise $100,000 for homeless charity We Are Mobilise through Nedd's Uncomfortable Challenge. Mr Simpson said the idea came after meeting homeless people in Kalgoorlie, and he wanted to do more than buy them food. He plans to isolate for the first 24 hours, then beg for food before moving into busier city areas.