By the time you are 60 you can do SM runs in 2 min and net about 30-40g depending on shards and the like. Loot, Reset, Run again. Sell Silk/Mageweave another 30g+ every 5 runs. You will have your epic mounts before you reach 61, and for 3000 g you are looking at 100 runs, built in with running out and reseting 5.6hrs of farming and you will have your gold. Easy as pie.