Exactly.... So don't show the pretty cheap print, if it isn't what you are selling...
The top of the line 3M is good stuff and will last a good 5-7. Layered is a little trickier to put on, but not impossible...
Honestly, on the side of the trailer, done in one color(black, assuming white trailer), the graphic will be a little more subtle, and will hold up even better.
Oh and we don't worry about what the higher grade vinyl costs, as far as we are concerned, that cheap stuff doesn't exist.