Hi DjDave and Welcome to the Forum!
The Coachmen motorhomes of that era were generally good units. Not the best or most luxurious but fine overall. However, since it is 21 years old, all bets are off. How the unit was maintained over the years is the only thing that matters. As Mike said, maintenance is the key. If it wasn't maintained and has suffered leaks and repairs neglected then it will be a nightmare, especially if you are unable to handle your own repairs. BTW, I imagine it has a rubber roof like mine.
Best of Luck!
1995 Coachmen Santara 360MB 36' w/slide.
Ford F53/460 chassis, 1997 Jeep Grand Cherokee "toad"