As the owner and user of a slightly older coach, please take what I say as fact.
If you are not a very competent mechanic now, please reconsider this idea. As the coach has been sitting all this time, the brakes will probably require a lot of expensive parts. There is a high probability that you will not be able to open the rear brakes without some destruction. The steel lines may have rusted to the point that they are not serviceable.
All of the rubber parts should be replaced. This means all the rubber. Not just the tires (that is a forgone issue), but also brake lines, brake cylinder parts, suspension bushings as well as all the belts and hoses.
The fuel system is not ready for the stuff that passes in most states as motorfuel these days. Much of it will have to be replaced. If was not stored correctly, the tank(s) may also be a problem.
If you attempt this, the first thing you have to do is identify the chassis and lay your hands on all the parts lists and service documentation.
Then the fun begins. Do you have a place that you leave this monster blocked up for weeks at a time? This should be anticipated. If you are working a regular job, the most you will be able to put at this project is about twenty hours a week. That will make things slow and then comes the weeks it may take to procure some parts and pieces.
If you can do this it may be rewarding. If you do not have the time and resources, it will be a money pit and you will probably have to pay someone to haul it away in a year or so.
In our group that is composed entirely of coaches built between 1973 and 1978, there is a standard line. "A reliable and travel ready coach will cost 25K$ - all at once or as a kit." You are looking at the same thing here, but you will not have the vendor support that we do.
I wish you luck and safe travel.
Matt
