You don't seem to understand..When you trade your trailer in and finance a new one..You will still owe whatever you owe on your trade in plus the difference in price between what they give you for a trade in and the sale price of the new trailer. In simple terms, You owe $30,000 on your old trailer, they give you $20,000 for it on a trade. The new trailer sells for $50,000. You will pay them the $30,000 difference from your trade to the new one plus the $30,000 you still owe on the old one= $60.000..Simple as that. They aren't going to pay off your old trailer without getting the money from you.
B.O.