Make sure you have a place to sleep in between hours of building apps.
Many past Mobile Makers have used Just Passing Through (JPT). They provide short term affordable housing in the area. Other options in the area include TempHomes Chicago and V-Suites (though these may be significantly more expensive than JPT).
Airbnb has also proven an affordable and useful option for many of our former students that are comfortable commuting to our River North location. Chicago is a BIG city. If you are looking into that option, let us know if you'd like neighborhood recommendations or if you'd like some advice on a certain area.