I'm at edge of smokies in tn.
I don't think 50 trees is too many, I still have lots of space after putting in 500 chestnut trees and 25 each of six other nuts and
native fruits, and half dozen peach trees, still have room for blueberries, grapes, apples, and some other fruits. Its a multi year process to prepare the spaces, buy what I want to plant and quite a bit of labor in planting. I have no intention of ever doing annual row crops in a big way ever again but planting trees and bushes that produce a crop every year is much more attractive to me.
20 something years ago I tended 250 peaches and 250 apples and after third farmers market each summer week I wished I had more trees in the ground.
I'm of the opinion that planting too much can't be a bad thing it just offers more options in the future when they mature, plus I have no intention to spray any chemicals, so bugs will surely get something to eat as well as wildlife. In fact I had an ag agent once tell me to plant twice as much as what your really after because there is no way to control all the wildlife from getting your fruit crops.
anyway the dwarf varieties that are 1/2 to 2/3 normal size are very attractive.