Take a look at the rentable stables i built on my server ChaosCraft (chaoscraft.playat.mc)

The stables have a medieval theme and make use of plugins to allow player to rent a stall, there horses are completely safe and kept loaded by the server. Its a really good way for players to collect and show of their horses.

It also adds a cool social area to any spawn, i will likely build bigger and better stables in the future.

P.s. If anyone is interested i will do a video on how to install and set up a similar stable so players can rent them.