My neighbor bought a 1100 sf condo @500,000 with 100% financing in 2006. It was foreclosed. They didn't lose money, but credit. This is not bad. American (lot of them) do 100% financing, so they can walk away.
I never use residential properties (such as apartment building, duplex, townhouse, single family house) as investment/income source. The law treats the tenant better than the landlord (a little bit unfair to the landlord in my opinion). Basically, more problems and much less return.