Loft As-Built Plans & MPE

The conversion is finished—a 20' × 50' RV storage bay now houses a lower-level living space with an upper mezzanine loft. My role is to secure the permit after the fact, so I need a clean, permit-ready drawing package that documents exactly what already exists... (Budget: $1500 - $3000 USD, Jobs: Architectural Engineering, AutoCAD, Autodesk Revit, Building Architecture, Building Design, CAD / SolidWorks, CAD/CAM, Drafting, Structural Engineering)