It would be easier to spawn and set up but it would be much more demanding on your hardware. And more difficult for me to make than separate trailers with couplers. The original was the same one, just lower quality and only one glowmap for entire light.
The textures are, well, meh. There are not any interior customizations yet. Edit, the interior textures are ripped from FS17, and if you know FS17, you know that the interior textures aren't good, so @MRcrash isn't at fault here.