Not sure on this but think you may find some value in getting these old barns on your state register. Might help with taxes or rules regarding it. Then it may be like the Century Farm do in our state, you get a sign you pay for to tell your family farm is over 100 years old.
In some areas these old barns are used for restaurants and other types of businesses. Remember near Dayton Ohio there was a restaurant called the Old Apply Barn, in NC there was a BBQ restaurant that was an old barn, still had the stable walls in it. Here an old warehouse is high price to rent for weddings and other social events. No heat or cooling system in it and outside walls (no sides on inside of the studs) only with holes in that wall.