Outland ore/herbs sells for a good amount and it may actually be better than Cata ore/herb prices at the moment. There's no quick way to 150k though no matter what path you choose. Traditional money-makers in Cata have mostly deteriorated as the expansion comes to an end.
Absolutely worst case you can make 6k gold a day per bot just vendoring stuff from a grind profile, let alone disenchanting those greens or selling them.