Looking for advice, wanting to put fruit trees on a hill

Hello everyone,

So I am a property manager and part owner of a warehouse complex, (Monroe NC) in the back there is a hill by the fence. (Other side of the fence is the neighbors property.) on this hill right now is just grass. I was thinking it would be really great if I could put some fruit trees there. I saw some apple trees and pear trees for sale. But I don’t know much about this. I would love to have some fruit trees on the hill, some flowers on the ground, (maybe some wild flowers on the slope). The ground is pretty tough and has clay in it. Anyways, I don’t know what kind of fruit trees to plant, which ones need a partner, and how far apart to plant them from each other. If anyone has any suggestions, I’m ready to pull the trigger and do this in the next few days. Thank you very much for your help and advice.

Ps. After looking at the photos, if you have different ideas on a cool way, I can use the space, please feel free. I would love to do something creative/ interesting with the space. (And I was hoping one day to be able to get some fruit as well.)