New to RV's NEED Help

From personal experience I would not recommend buying a rig if the original manufacturer is no longer in business. It can be difficult to find original replacement parts like tail light lenses and other proprietary exterior items. That said, original or usable replacement interior items can can usually be found at RV parts supply stores. Most original owners manuals are generic and do not contain "housebox" detailed maintenance, trouble shooting and repair info or chassis/drivetrain maintenance and troubleshooting info. A factory or Chilton's van manual should be available for those purposes.