Good luck. You will need it. I purchased a NEW one in 1988 and it was nothing but a lemon. It was the last year Ford had a carb engine. I will list some of the issues I had with it. Perhaps it will change your mind not to sink your money into it.
The fuel pump went 2x.
The engine mounting bolts broke exaust maniford broke and I also had to get a banks pack for it.
All tires blew. The Gulfstream (Sunstream Highrise) fitted it with under rated tires. They were Michelin.
Worst of all... The roof is made of Aluminum, but the frame is steel. There is no insulation between the two. Steel and Aluminum do not like each other, and electrolysis affected the roof causing small pin holes which you could not seal and the roof ended up leaking like a sieve.
The air conditioner seal went and it leaked around the unit, but installing new insulation did not help, cause the roof leaked.
I am sure there is more, but that was along time ago, and I am sure I forgot a lot.