Commercial Multi-Zone HVAC CAD

I need a full set of HVAC CAD drawings for a commercial project. The building already has complete architectural blueprints; I will send the DWG files as soon as we start so you can layer your design directly on top of them... (Budget: $10 - $30 USD, Jobs: 3D CAD, 3D Drafting, AutoCAD, CAD/CAM, Civil Engineering, Engineering, HVAC, Mechanical Engineering)