Beautiful, open barn. Could have a lobby, break room, bunkhouse, and bathrooms upstairs. Horses, tack, feed, and hay downstairs. The upper could also look out into the arena as a second level, and include an announcers' stand.
"Jehovah is good to all, And his mercies are over all his works. All your works will laud you, O Jehovah, And your loyal ones will bless you" Ps 145:9-10