The city of Chicago is committed to making sure there are more affordable places for low-income citizens to rest their heads at night, but the rules they've put in place to do this don't sit well with some of the developers in the city. The Home Builders Association of Greater Chicago last Thursday has filed a lawsuit against the city's Affordable Requirements Ordinance (ARO), which is part of Mayor Rahm Emanuel's five-year plan to increase the number of affordable housing units by up to 1,200.