I purchased, gutted and renovated a 1 bed flat in the city 4 years ago. It's gained about $7,000 a month every month for the last 3 years, plus saving about $3,000 in rent. Not exactly 'income' but most certainly passive, and I do plan to sell out when I feel prices are aproaching a peak and move out the city so will yeild then. Neighbouring flats usually sell within 7 days of going to market.