Naturalistic Front Yard CAD Design

I already have the hard-scape plan for my front yard; what I need now are two alternate planting layouts drawn directly in CAD. The goal is a naturalistic look built around shrubs and flowers only—there are two existing dry creek beds ... (Budget: $250 - $750 USD, Jobs: 3D Modelling, 3D Rendering, AutoCAD, Building Architecture, Horticulture, Landscape Design, SketchUp)