MEMPHIS, Tenn. – If you think the most expensive bill for families is housing, think again. Childcare costs have surged so much that researchers say having more than one kid in daycare is more expensive than rent in every state. According to a new report from the Tennessee Commission on Children and Youth, families in Tennessee spend, on average, about 40 percent of their household income on childcare. It’s forcing some parents to make tough decisions to ensure their children get the care they need.