The inspiration for this post comes from a recent vent discussion with a guildie. He lamented the constant struggle to accrue gold. He wants Epic Flight but can't afford it. He has one L85 toon with Mining and Blacksmithing but he hasn't maxed either and doesn't have any other professions available. He is still in the Cobalt phase of leveling Mining and Blacksmithing.
I suggested making a circuit through Northrend for Cobalt or even Hellfire for Fel Iron as a quick fix. Both types of ore are selling well. Since he hates to mine he would prefer some way that minimizes the time he uses that fancy pick-axe.
So the question that seems most relevant for him is 'how can I best earn gold in this situation'?