Before embarking on their DIY renovation, the Cashios knew that the Airstream would become their full-time home—so it would have to be practical and family friendly. For $23,000, they transformed the tired-looking camper into a home with room for the boys to play with their toys, a bedroom that’s separate from the living area, and a large kitchen that fits an apartment-sized fridge, a 24-inch oven, a 24-inch cooktop, and a microwave.