First off, you got a great deal.
Secondly, I would get a good fuel system cleaner, personally I use Lucas products, and use an extra strong dosage. With the age of the MH and the low miles it could have a lot of crud in the tank and lines that the cleaner will take out. After you have run that tank full through then change all fuel filters, change the oil and filter, thoroughly grease the chassis and drive line, change out the brake fluid so it is all new, I changed the differential fluid on mine and the transmission fluid and filter also.
As noted by Cpartjr the tires will probably need changing. They may look good, but find the date code on the tire, anything over 7 years old needs to be replaced. RV tires seldom wear out, they age out. Toyo, Hankook, Sailun, etc. are just as good if not better than Michelin and Goodyear and are cheaper to purchase.
You may also need new shocks, air bags, steering stabilizer, and a tune-up. Basically you need to start at the front bumper and when you reach the rear one you will have checked and repaired everything. This means doing it twice, once for the chassis and the second time for the coach.
Congratulations on your new MH and may you have many great times with it.
