I just happen to have their FACTORY SER. CENTER MAINTENANCE sheets in front of me because I have been going through my files for some one else interested in my coach.
This is the prices for the 2009 year last time I was at Newmar, 52 items on two sheets going through the whole coach for every item in coach including chassis plus cleaning of everything in coach appliances etc, etc. Prices range dependent on what package you decide from $1200 to $6800 plus discounts of 20% in different package combinations.
Not cheap but you will have a new coach in some packages when completed.
Just for interest
their inspection for roof --$40 , windows, doors $50 after inspection they would than advise as to what needs to be done.
I can advise you now you will need it done on a coach that old as with my 2003 all sealants, in seams will need to be done, windows, doors, windshield rubber mounting gasket and as I gave you in links the roof needs work to be done for roof end cap side seams and top roof seams.
Having it done at factory by the people that built coach you know it will be done right.
Many members tackle the jobs themselves and will save money but it is work, believe me, for them and possibly a helper and more if a person needs to learn how to do a correct job.
We may have dealers that would tackle the job but is time consuming to do.
Once done you going to have a extended stay in your newly sealed coach.
You could E-MAIL or call and get new sheets and also ask pricing of exactly what I have just described about roof, windows all seams in coach and maybe check the slide rubber seals and costs for windshield, slide replacements.
SLIDE SEAL REPLACEMENT some of the items if applied to your coach for
FULL INSPECTION
It would not matter what SOB coach of that age, the same would apply.