A derelict motel on a busy stretch of Columbia’s Two Notch Road will be remade into a gated community with mixed rents for families to find attainable housing. Under the plan, the Grand Motel at 3003 Two Notch Road, a storied but deteriorating motel built in the 1950s, will become Grand Village, a gated housing village with 40 apartment homes at varying price points and a community center.