Structural Engineer for Garage Ceiling Modification

I need a structural engineer to design and provide specific modifications for engineered trusses in my garage. The goal is to create a 12x8 fort area and increase the ceiling height by 18 inches. Requirements:... (Budget: $750 - $1500 USD, Jobs: AutoCAD, Building Architecture, Building Design, Building Engineering, Carpentry, Civil Engineering, Construction, Structural Engineering)