I can't help with your land search but once you get settled I'd be happy to give you some mulberry cuttings. I have both red/black and white mulberries. Mulberry is easy to grow from cuttings. I'm located in Mustang.
You should be able to grow blackberries, peaches, plums, apricots, pecans, hickory, walnuts and lots of other stuff. There's also sand plums if you want another native fruit. It can be harsh here in the cross timbers, but lots can be grown here as well.