Happy Birthday Kitchen

Homeowners Daron and Randi Benbinisti are tired of their outdated and confined kitchen. They want to transform their kitchen into a more open space to better fit the parties they love hosting. With host John DeSilvia's help, they plan on tearing down a wall to open up the kitchen, tearing out a staircase to add more floor, and install all new cabinets. Will this renovation tear up their budget or will they be able to tear into some birthday cake, as they both turn 40 in their dream kitchen?