Wet-Stamped Cow Shed Structural Drawings

I need a licensed structural engineer to prepare and wet-stamp complete construction drawings for a 30' × 50' × 12' cow shed built from galvanized steel tube framing. The generic supplier plans I have... (Budget: $250 - $750 USD, Jobs: Architectural Engineering, AutoCAD, Building Design, CAD/CAM, Civil Engineering, Construction Management, Engineering Drawing, Structural Engineering)