Start a DK on a high population server that I have NO ALTS on, pick up and level mining and herbalism to get a pile of gold going, then drop them for JC/Alchemy and start raking in the gold to 500K. Track /played and see how long it takes.
As of this post my Death Knight has 4051g 63s 64c and /played is 3 days, 4 hours, 45 minutes. My DK is also level 82 with 525 mining/herbalism. I could have had more gold by now but my favorite thing to do in Cataclysm is do the 77-79 PvP bracket with Twink Gear. Great way to make money also means a great way to lose money on the opposite end.
Short Term Goal
10k Gold, of which I will spend on materials necessary to grind JC and Alchemy to 525, and have at least 2K left over.
Long Term Goal
500k gold. 1 Toon on the server.
I am going to keep posting in and out on this, probably only as I hit my short term goals. If you are interested in more frequent info on my project follow me on twitter @PhatLewtsGold