To help with costs (and possibly make money) is to craft things that you can sell. It seems you're okay with selling stuff on the AH so I recommend reading this article over at The Consortium.
Also keep in mind what you're crafting Disenchants into and look at how much that sells for on the AH compared to the thorium costs. Greater eternal essences and Illusion dust are also usually priced high on the AH, so effective costs can be reduced or turned into profit.
I'm surprised by the thorium prices, especially with how much easier it is to farm that stuff now (Winterspring is swimming in the stuff).
Best of luck.
"Just because it's not nice doesn't mean it's not miraculous." - T. P.