Guess it depends on your preferred method of getting gear as well as other expensive things you might want! I've already spent (estimated) 30,000g (not including epic mounts - that would bump it to 51,000g at 80) between leveling 2 JCers and buying epic items galore at 80 because I'd rather start half epiced out then get all my gear by running instances

I still want to get a mechano hog, going to need to buy 5 red drakes (10k gold), have about 10k more crafted items to buy, and maybe get a mammoth or two, plus maybe 5x band of the kirin tor, if nothing else as an extra hearth. That should cover me for needing money for quite awhile! For me, it looks like wrath has about 10x as much money to sink as BC ever did.