Horse Office or Bedroom --- You can get an unstained wood box similar to this at craft stores like AC Moore and Micheals. Stain or paint it to work with your office or room (or, leave as is) and add horseshoes as handles.
Tidbits from the Tremaynes: What My Boy-Toy Will Do For Me. DIY: Lumber Storage System Tutorial ~ This is awesome! The slots allow you to organize horizontally & vertically, keeping lumber off the floor & similar lumber together & it's on casters!
Available for free or cheap at all home improvement stores, PVC pipe is totally great for home storage and organization in different ways. Take a look at these DIY PVC pipe storage ideas for inspiration.