HVAC Design for Medical/Dental Clinic

I require a qualified/experienced HVAC / Mechanical Services Engineer to prepare a practical and economical air-conditioning and mechanical ventilation design for a small single-storey medical/dental clinic in Vineyard, NSW, Australia... (Budget: $250 - $750 AUD, Jobs: Air Conditioning, AutoCAD, Building Architecture, CAD/CAM, Civil Engineering, Heat Load Calculation, HVAC, Mechanical Engineering)