Electrical designer in Chicago area

I need someone to as-built the electrical system in a vacant warehouse I own. Then after new tenant gives their load list, size modifications and create a drawing package for bid and permits. The warehouse is 45,000 sq ft, mostly open shell with all conduit and panels visible/exposed for as-builts. I do need someone local to the region who can visit the warehouse to start with an as-built. We have no drawings of the existing electrical system. Obviously not looking at fixed rate here, need hourly rate.