Hi all, I am thinking about buying a used hi-low which weighs around 2500. I have a 2006 Mazda Tribute with a tow limit of 3750; it does not have a tow package. I have called several local dealers regarding prices of adding a tow package and have gotten quotes from 450-1700.00. I have no idea what I actually need. Do I need a sway bar? Do I really just need to get a ball added? Any insight would be appreciated.