Commercial Structural Drawing Updates

I already have the part of structural drawings for a commercial building; I now need a revised set that reflects a few subtle but important changes. The scope is limited to adding and/or removing several... (Budget: $30 - $250 USD, Jobs: 3D Design, 3D Modelling, AutoCAD, Building Architecture, CAD Drafting Review, CAD/CAM, Graphic Design, Structural Engineering)