The last episode of the series features a young Shropshire couple who became mortgage free by building a second house, which they sold to clear their debts. In Staffordshire, Sarah meets a single dad who plans to halve his monthly outgoings by quitting his rented house and transforming an Airstream caravan into a luxury home, for just £15K. A Cotswolds couple have built a two bed farmstead home inside a pair of former mobile offices for just £36,000. And in London, Sarah meets Dominic, who bought a former parking lot with a friend and together they built two, four-storey homes out of concrete for £200,000, each now worth over £1million.