60x25 Rustic Lean-To Barn Plans

I need a complete set of construction drawings for a 60' × 25' wood post-and-beam lean-to that will attach to the side of my existing building here in British Columbia. The layout is straightforward: a... (Budget: $250 - $750 CAD, Jobs: AutoCAD, Building Architecture, CAD/CAM, Electrical Engineering, Revit, SketchUp, Structural Engineering)