Have you looked at the property? Did it look extremely stony?
I live where it is extremely rocky. I don't know if there is a difference between stony and rocky. I have rocks as big as boulders.
People run
cattle and have goats here. No one grows and cuts
hay except in the river valleys.
I would recommend looking at the land again if you looked at it. Take something to be able to see how far down the rocks are and where they are.
I am not familiar with those soils nor have any idea whether this is gravel or big stones they are talking about.
Talk to people in the area about the soil. Look at what people are doing with their land. Are they growing hay and other crops?
Just some suggestions.