Welcome Fred! I suggest you spend a little time looking through this forum and other forums as well so you walk in with a good knowledge base to make your purchase. I would strongly encourage you to have a pressurized leak test before you buy anything of that vintage. They can show you any current leaks in the trailer. That will give you an idea of where to look for damage.
RV's are great, but water is their worst enemy. A little roof leak can lead to rotten wood in the roof, walls and eventually floors, and a nightmare to fix. Further, water will lead to mold and mildew. Be prepared to walk away if you suspect water damage.
When you think about full timing, think about things that are important to YOU. For some people that is a big bathroom, for others its a big bedroom, for others its a big kitchen. Its rare to find a camper with EVERYTHING you want, especially in an older rig. Consider where you will be going and what you plan to do with it.
For example, if you are going to the American Southwest, you might spend a considerable amount of time outdoors because it rarely rains. If you are going to the Southeast, maybe you want more "living space" inside because you'll be escaping heat and humidity. Take that into consideration when deciding what features you want.
I wish you the best of luck. My wife and I are looking forward to the day we can retire and travel with abandon!
2015 Ram CTD
2015 Jayco 29QBS