I would not put in any dividing walls. I keep the space open for more room and once you are in there you might change things around till you find what u like. I would put in a ceiling and insulate everything . I would take out the big door and put in a regular door. I would put window in on 3 sides. I would take the back wall and make it one sold cupboard with sliding doors and shelves . for storage of all types. I don't know how cold it gets in KY but here in wi. we would insulate the floor some how to. and have a built in heater. Boy I like spending your money lol. good luck and have fun.