I finished my toons with a little of Sholazar left to do,then when I was ready I did IceCrown at 80 and the Gold just rolled in.
Doing every Q I come across and collecting all loot I can make about 5000G in a 8-12 hour session,(includes selling everything I grab,[NO Disenchanting]),its almost criminal how easy the gold floods in.
You will have to do all these Q anyway to unlock the Dailies there.
If you can get your mining up to do Saronite that helps a great deal too.
Also not as efficient but if you need a little gold fast you could always do Q'Danas for a little injection.
Hope this helps