most productive fruit trees/bushes/etc. for the space?
I would like to grow as much fruit as possible in the space I have, which is rather limited. In the front yard there is room for a couple of small trees, several bushes, etc. as long as they look good (HOA is a pain). In the back, I have room along the perimeter of the 6' wooden privacy fence. I could also hang cattle panels along the inside of the fence for trellising if needed.
Which types of fruit trees/bushes/vines produce the most fruit for the space, and are not too difficult to grow? Basically, I'm looking for the most bang for the buck so to speak. I am considering blueberries, blackberries and boysenberries, maybe a peach tree and a self-fertile almond like All-in-One. I like the idea of hardy kiwi but I'm afraid it might overtake the backyard - any input on this from those who have grown them or seen them?