Smoke Detector Placement Drawing

I have a current floor plan and now need a clean, professional drawing that shows the exact placement of every smoke detector. Along with the marked-up layout, I want a short write-up that explains why... (Budget: $12 - $30 SGD, Jobs: 3D CAD, Architectural Engineering, AutoCAD, CAD/CAM, Drafting, Engineering, Mechanical Engineering, Revit)