The living room is the final room on the list. Matt doesn't care what Kate and Alex have planned for the room as long as he gets his television. Kate has to have a computer space, so Matt takes advantage of a dead space underneath the stairs. He designs and builds a desk made from antique barn wood, adding a rustic, loft-ish vibe to the room. Alexandra's plan to use aircraft cable as a stair railing backfires when the design comes in at over $4000.