Modern Coastal 20x20 Garage Design

I need a full set of architectural plans for a 20 ft × 20 ft single-car garage that will sit beside a coastal home. The look must be clean, contemporary, and clearly “modern,” with rooflines, openings,... (Budget: €250 - €750 EUR, Jobs: 3D Modelling, AutoCAD, Building Architecture, Building Design, Home Design, Interior Design, Revit, SketchUp)