In Scotland, David Blaikie grapples with a modern extension that will double the size of an old railway station, making it a dream home for a young family. But money is tight so they cut corners at every stage. One of the cost cutting exercises involves overzealous owner Kenny getting his hands dirty. But when he and his mates take on the demolition of part of the house, their gung-ho attitude leads to costly accidents.In the New Forest, Wendy Perring designs a mobile home like you've never seen before. Not only is this state of the art bespoke house the same size as an average Victorian semi, Wendy hopes it will also be the top eco home in the country - no mean feat. The home is built in a factory in Yorkshire, but when they try to get it to site, it turns out to be less mobile than expected.