Because rent is not the only bill a resident will have. If rent is $600, and they average $150 in utilities, $50 a week in groceries ($200 per month), $350 on a car (car payment, insurance, gasoline, and maint) their bills will total $1,300 per month. So they are already $200 in the hole if they make $1,100 per month. And that does not include the ever increasing cost of medications, which cause more out-of-pocket costs even with Medicare/Medicaid. $1,100.00 per month is only $13,200.00 per year.