Unless you go to a camper that has no wood (there is one manufacturer that is metal and composite... starts with an A...) then you will have problems if/when it leaks.
Wood can be fixed by an average homeowner. Metal framing will most often require someone with more knowledge and tools.
My advice is find a floorplan you like by a manufacturer that you have some confidence in. Inspect it well when you purchase and keep up with maintenance. If you can keep it covered, even better. Water is your enemy, no matter what it is made of. If you keep it covered, it will last a lot longer.