Agree with the other comments here: LTW is the way I made my first hundred thousand.. and second... and third... And in a short amount of time. aldgoat leather sells well and in small stacks. you can make a large stack of HQ, put up a few at a time, and within a few days (or hours depending on how actively you monitor the MB) have that 40K. In the mean time you can SB gather gear as suggested (I got mine from a choker), and either sell the rest, or make HQ gather gear pre-melded and sell that for even more.

LTW is the one crafting class that I always have made gil on, at every step of the way. Even if it was just with aldgoat leather

Oh, and btw, you can also merge the two, you should be able to HQ aldgoat leather at 50, even without the accessories, so you can wear gather rings/choker while you craft aldgoat leather.