Heidi grew up in the countryside near Inverness, but she and husband Steven can't afford a home there. They've decided to try to construct one, but their strategy is a risky one. Heidi's parents have agreed to temporarily re-mortgage their own home to fund the £70,000 build cost. The couple are keen to do as much of the work as possible, so Kieran Long takes them to see a property which is full of low-cost ideas that could add character to their home. Meanwhile, Piers Taylor visits a boat yard and a plastics bending factory in his search for design solutions that could be achieved on Heidi and Steven's budget.