Structural Plan for Permit

I need a structural plan for an existing building. This is to obtain a permit to finish converting it into a seasonal cabin for two people. This building is on a 6" deep granite gravel bed for skid support... (Budget: $250 - $750 USD, Jobs: Architectural Engineering, Architecture, AutoCAD, Building Architecture, Building Design, Building Engineering, CAD / SolidWorks, Civil Engineering, Construction Management, Structural Engineering)