You know when your DW sends you a pic of this while shopping at the local grocery store she has an eye for TC's. Although this is not technically a TC very cool and unique rig.
Agree it looks like they took the wheels and hitch of a 5er. We have the same, although shorter. Put it on a flatbed and built down the sides to enclose under the TC,it added a lot of storage for our trip to Alaska but do like what they did.