Teton never changed from wood framing. The trailer in the photo was 10-years old. I believe its length was 39 ft. I would suspect it weighed around 20,000 lbs.
Yes, I believe the wire you see is the reinforcing wire of the sewer hose. The original position of the trailer was on the gravel pad at the far left. You can also see the water hose and filter in the photo. It appears the trailer rolled once.
Eddie and Betty were in the trailer at the time of the tornado. They felt the trailer lift first then it rolled. Both were knocked unconscious by being tumbled about. From looking at photos of the interior of the trailer they were probably hit by some of the furniture. From photos you can see the oak dining table, chairs, sofa and recliners all on the roof which is now the floor of the trailer.
The tornado occurred May 1st in Tennessee.
Link to news article about the tornado.