Ok, not a Multistrada but it is another Ducati that wants to head off road - a moddified Ducati Monster set up for some serious offroad. Thanks to fellow MTS1200 owner JorisM from Holland for the photo:
Leo [ Leo Fleuren's of Affetto Ducati - see Leo's MTS1200 Timbuktu Challenge bike here] had a winterproject for another customer who wanted to drive to Timbuktu throught the desert on a Duc. Therefor they build the attached. Perhaps you find this interesting, especially because of the large wire wheels.
If you want something similar .... Leo was talking about bring the bike plus at least € 12k (or did he say 16k? not sure anymore now). One of the major difficulties was the front suspension and the larger wheel - create sufficient space for the wheel to travel without touching the engine or frame. They had to alter the headstock bearings in order to increase the front fork angle by 2 degrees ....
From MTS1200 - Multistrada 1200's with a difference!