It looks just like one of our photos. I see you haven't gone naked on the wheelcaps ... was kinda hopin' to start a movement on this idea as those hubcaps are redundant squeakers.
I have a friend who would probably do the conversion work at a fair price. If you and your partner can stand separate relatively narrow twin beds, a sofa and dinette mod can really open up the aisle.
As for a big dog, we traveled a LOT with 4 50+ pounders, w/ little problem (they found their places, but a few territorial clashes did occur in the settling )