Here is a cool garrison calculator that shows all garrison benefits...kinda works on mobile but not really.
http://wod.wowhead.com/garrison-calc#AkYmIAY
Like if you build the stables it allows you to trap and tame rare draenor mounts! Lots of cool stuff. I will read through for more highlights later.
Edit: garrison guide
http://www.wowhead.com/guide=2456/guide-to-garrisons-in-warlords-of-draenor
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