Overview: Sarah visit a beautiful lakeside property just outside London, built on land where others were unable to get planning permission. There's also a couple in Surrey have a very clever plan to use the sale of their houseboat to build a mortgage-free floating home, and boost their pension. In the West Midlands, a couple have built a cabin in a relative's garden to be there to help with his Alzheimer's. And a man in Hertfordshire has sold off half of his house, raising £250k for his and his wife's retirement.