I went from ~20K to 1,6million at start of MOP.
New XPAC / new patch is the only way to make such a push if you don't already have an established economy.
My push involved buying out literally dozens of thousands herbs from AH (50+ stacks at a time, several times per day) , AUTO milling , and then converting all to ink, where id simply make shittons of cards (using other people's scrolls using a very sneaky method I developed

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Decks sold for 50-100K during first DMF , 20-50K during second DMF, and consistently sold for 15-25K thereon.