Minimalist Condo Space-Saving Design and Purchasing Help

I have just moved into a 1,400 sq ft, two-bedroom condo on the second floor and want to make every square foot work hard without forfeiting a clean, minimalist look. The living room and both bedrooms need... (Budget: $250 - $750 USD, Jobs: 3D Modelling, 3D Rendering, AutoCAD, Furniture Design, Home Design, Interior Design, Revit, SketchUp)