I used to drive a 1992 KW with a 48' Landoll. I picked up and delivered shipping containers for a rental/storage company.
They are very expensive BUT worth the money if you know how to use them. The guy on "Shipping Wars" that has the 53' with triple axles said his cost $150,000.00 !!!
I liked how if the trailer wheels got stuck I could just pick up and move them to solid ground or if the tractor got stuck I could push it out. (I don't think I was suppose to but the trailer was used and had no instructions!)
I have seen other types of copycat trailers but they are not as versatile.