Well Eplpa,
You either have a treasure or a cash-sink. Old motorhomes can be either and it is now pretty much up to you. (That is assuming there has been no water leakage.)
First thing you need to do is confirm the manufacturer and model of the chassis it was built on. There aren't many choices, but you will need to have this tied down to get any parts you need for the running gear. Also, find and acquire all the technical manuals you can for that. You may not need them now, but you will need them.
Even on a coach this new, there will be age issues. If you do the work yourself (none is difficult) it will not be expensive. If it does not get done or at least attended to, it can get very expensive - fast.
Next, plan to flush the brake system, and the cooling system as the brake fluid has aged out and can become corrosive and the coolants corrosion inhibitors has be expended. This will be easier as you will probably end up replacing a hose or three. Suspect any rubber part. They just don't last forever, regardless of care. As soon as you can, collect the DOT dates on the tires.
has a nice page about this. Believe the people that tell you that eight years is the life and in hot areas it can be less. The damage one tire self-destruct can do will be a great deal more than the cost of a full set of tires.
The rest of the issues are with the house part. Remember that this was built 30+ years ago and has been though a 20 year long earthquake. As said above, the manuals are out there. You just have to do web searches until you find them all.
Can a coach this old be reliable and enjoyable??
Look at the picture in the sigfile. That coach is a decade older and we just returned from a 3500 mile excursion.
Matt
Matt & Mary Colie
A sailor, his bride and their black dogs (one dear dog is waiting for us at the bridge) going to see some dry places that have Geocaches in a coach made the year we married.