3rd spec for gold

Hello,

I know it was suggested before but still, this option would be a great addition - and gold sink - if available for gold.
The way I see it, it could cost ~10k gold to activate, ~500-1000g to reset talents, maybe ~200g to add/change glyphs?
Outland already has something similar (for dual talent) so I might be wrong saying this but it's probably not too much of a hassle to be implemented on other realms.
Don't think it could affect the "blizzard-like" model warmane strives for and I can't seem to think of a way this could be abused.
It would be a great addition for pretty much anyone that wants to play more than 1 spec and also do pve/pvp, and lets be real that is the majority of us. Hell, maybe it could even balance BGs a bit since more people could take a healing spec in those 3.

Waiting on your opinions on this.