Hi Doug, and welcome to SR. Look at the upper left corner of your screen, click on "resources", then click "primary treatment". You'll find many facilities listed there. I haven't checked out that list, but many you find on the internet are "for profit", so much more expensive, although they come with many nonessential ammenities. As another alternative, check with local mental health centers and hospitals in your region. Many community mental health centers operate residential treatment facilities for addiction recovery. There are also lots of treatment centers funded, in part, by the state. These alternatives are usually much lower cost, but provide excellent care. Also look in your yellow pages under "alcoholism" or "drug addiction". Also, click on the link below. There are numerous Illinois facilities listed at the bottom half.
http://www.drug-rehabs.org/bystate.php?state=Illinois