How many alts and treasure hunters per alts do you have to make 1.5 millions in 6 weeks??? That seems ridiculous.
32 characters and at least 10 treasure hunters each. (RAF:ing up 10-11 more characters at the moment).
But I also make gold from bags, enchants, transmog and rare missions - all garrison related.
I don't buy mats with garrison resources and sell, I use them all myself.
I don't do Kazzak on more than a couple of characters. I do not have any barns.
I do missions twice a day and reset work orders twice a week.
8 tailors making bags. 4 Enchanters, 15 other chars with enchanting hut to make crystals.
Between 9/24 and 30/11 I netted 1848849 gold after expenses. Expenses included 300k Mythic Blackhand boost, 200k CM Boost, 50 k rep mount.
So I'll add those to my total.
2398849 gold in 68 days.
35277 gold/day.
Edit, I forgot that my expenses would include about 2x2 tokens (Europe) so add 240 k to my expenses.
Averages out to 38,8 k /day.
I am sure there are other Goblins that make a lot more than that.