I would buy a truck that is a couple of years old. This would help with the monthly payments and buy it from a dealership that will give you a warranty for Free. If you buy a class A - C, the engine and other mechanical parts will eventually wear out. With a travel trailer, you can replace your vehicle at any time but your travel trailer will last forever as long as you take care of it. My dad was a car dealer. He advised me never to buy a new car. You are upside down by thousands of dollars the minute you drive it of the lot.