Kevin meets Martin and Kae Walker, who want to build the ultimate family home, inspired by a giant farm shed. You couldn't meet two more different people than Martin and Kae Walker. Martin's a commercial architect who specialises in industrial build... (more)ings. He's clinical and technical, obsessed with how things fit together. Kae is an art director, a creative powerhouse who is passionate about giving buildings heart and soul. They've worked together ever since they got married, but now they're taking on their toughest project yet, building the ultimate family home near York, inspired by a giant farm shed. Kae's vision is for a 'mothership', a home that makes the business of being a mum easier, with a central command centre from which she'll be able to keep track of the kids wherever they play in the house. Her design is a warm and cosy concept, that conflicts dramatically with Martin's forte in building giant square warehouses. Marrying the giant wooden framed box he's designed with Kae's family friendly layout proves an incredible challenge, especially on their super-tight budget. And when the banks decide to tighten their belts and restrict new lending, Martin and Kae are left in a desperate situation - where will they find the money to finish their house?