Harry and Briony Anscombe have made a radical change to their lives, moving with their three young children from London to Cornwall - and setting up an outpost of their media business at the same time. It's a bold attempt to emulate the positive work-life balance and lifestyle they experienced in California. But even bolder is the giant five-bedroom house they want to build, heavily inspired by an American modernist house Harry saw in the 80s teen comedy Ferris Bueller's Day Off. All floating steel and glass, Harry by his own admission has become 'obsessed' with living somewhere just like it. But creating such an architecturally ambitious home would typically cost over a million pounds, and Harry and Briony have just £400,000 to play with.