PDF Pipe Schematic to DWG

I have a pipe-work schematic in PDF that I need redrawn in DWG format. Once the existing layout is faithfully reproduced, please add several new elements: extra pipe runs, valves, elbows and reductions... (Budget: $30 - $100 USD, Jobs: 2D Drafting, AutoCAD, CAD/CAM, Drafting, Engineering, Engineering Drawing, Graphic Design, Mechanical Engineering)