Lance 1121 Body problems by year

I purchased a lance 1121 camper in 2001. Since the purchase of this camper I have had problems with water leaks. After repair attempts by the dealership the camper was returned to the factory one year after purchase. Seven years later we find the camper was continuing to leak and the interior walls were water rotted. So far we have spent $10,000.00 In repairs on the slideout side. We expect to pay an additional $6,000.00 To $8,000.00 To repair the other side. The company is aware of the problem but refuses to provide any assistance. From conversations with the rv dealership we found out all 2001 models have the same problem. *Tr