Ch1ckad19

We have a 1994 Foretravel Grand Villa 240 36 ft. It pulls to the right, and the steering column vibrates. We have had new tires put on it and balanced, new king pin, and the track bar rebuilt with new bushings. $4000 later we are at a loss and the shop we have it at says they can do not more. Any ideas or thoughts. Thank you in advance ch1ckad