Multi-Functional Office Room Design

I'm looking to transform a uniquely shaped room with a fireplace into a versatile space. The primary use will be as an office for computer-based work, but I also want it to serve as a TV room and provide additional storage... (Budget: $250 - $750 AUD, Jobs: 3D Design, 3D Modelling, 3D Rendering, Building Architecture, Building Design, Building Information Modeling, Furniture Design, Interior Design)