>>509165329 (OP)>lawnYou mean "Useless land"
Aside from the already mentioned lack of water storage, you should honestly have quadruple the number of beehives.
My grandfather used to have six on a quarter acre. He kept them on an outbuilding he made that had a room for storage and where he kept his still, a little room for smoking and curing meat, and a generalized room where he worked, such as preparing the meat. Having them on a building means there is more garden space available.
Also while that amount of grain looks large, it's not gonna go as far as you think. You'd be surprised how much wheat you actually need to make a loaf of bread.
Also, get some pvc pipes, at least as round as a can of soup, knock some holes into the top and set them so a solar powered aquarium pump is keeping a constant flow of water.
In the holes put in sponges and grow lettuce and other quick-growing greens. This is good because you can set them up along your fences so they have very little footprint on your land leaving yet more available space.