I would change work space and storage into tack room, wash station and hay storage and make it a little bigger to fit all of that haha Horse Barn blueprint perfect just bigger and is missing the indoor riding arena :)
14x28 Barn with overhang. Includes 3 stalls sized for miniature horses, ponies or even goats, a built-in chicken coop and dog kennel. Full loft with dormer. Pine board and batten siding. Pine tongue and groove interior. Many options. Located in NH. Approximate cost: about $30k - delivered and set up.
Change to no loft and use the space for ventilation, add a crosstie/wash stall on the end of the aisle by the tack room. Put a wall and door in the 'tack room' and make the outside half a feed room and it's perfect!
*sigh* This is where I want to be! It just screams "Hey, come on in! Pull up a hay bale and grab a bar of saddle soap and we'll hang out and talk about horses, and laugh, and clean tack :)." (See Barn Plan