I need to know, are there hotels in Chicago with weekly rates that are inexpensive?

I have a wedding planned for April of 2013. I am marrying the love of my life who is terminally ill. I spent over 10 years looking for her because although we attended the same college she suddenly left. I found out later, it was due to illness and I want to grant her what she says is her last wish and that is to marry her. After we are married, I will be moving to Kansas with her for however long she has. Thanks for the help.