When you did your walk through and found all those problems you should never have taken delivery!
I don't know what your history is as far as buying RV's from dealers, but I can assure you it is nothing like purchasing automobiles from auto dealers. There are very few good RV dealers out there when it comes to customer service and follow up service.
Be prepared to get UGLY with them and badger them constantly to get your unit repaired. Most RV dealers don't want to see you again once they cash your check.