He will not receive any jail for a first time DUI. The criminal justice is way to overcrowded for that. It takes 45 days from date of arrest until your license becomes suspended. In my state car insurances do not find out about the DUI because it is not a conviction. You do need a breath machine now though for even first time offenders. Also, he will probably have to attend some brief "alcohol school" type program. The truth is some folks who are non-alcoholics get DUI's as well. If they label him as a higher risk or alcoholic then the hoops will be greater to jump through.