I think a big thing is making sure all the colors match or are similar. (ex: windows to brick walls, stalls to walls and floors) I love the tack room, it's nice and open and I adore the lockers. The layout of the halls is 'homey' it would look really nice with some clutter around the edges. For the outside some tall trees would fit in really well with some flowers or bushes. It looks really nice for being in progress and I'm excited how it will turnout!