That is a tough position to be in. Without an offer letter or current employment, it is hard to rent in the traditional way. Can you afford to pay six month's rent up front or stay in corporate housing until your secure employment?
Co-signer is the way to go. Your co-signer needs to have great credit AND enough income to cover your rental cost AS WELL AS their own bills. I work the north east area of the city where prices are lower than closer to the center. We have great transportation and plenty of rental housing. Count on paying about $850 or more for a one bedroom.
Let me know if I can help.
at 847-987-2198 or email@example.com to assess your possible options.