This week we're in double trouble in one of Australia's toughest markets with two couples who can't afford to take a wrong step. We're on the hunt for houses in some of Melbourne's most popular suburbs with Helen and Tom, a couple of downsizers whose business went bust last year, and also Robbie and Bec, who are trading Melbourne's hip bars for the burbs on a tiny budget. But buying houses can be an emotional business and both couples will find adapting to change is not so easy.