Think I bought everything before entering the mirage tower/Flying Fortress.. or whatever your version likes to name it

This was on Origins normal.
By the time I had beaten Tiamat... think I had over 300k but memory is fuzzy.

Above poster is right about the wind dungeon.

like many RPGs, by the time you don't have anything left to buy.. money rains from the sky.


In short, if you run through Tiamat's dungeon, you'll be able to buy anything you need from Gaia probably, unless you have 4 mages.
The treasure chests are loaded.
However you may want prorings before you go in there... Hence the "Money after I needed it 2hrs ago" comment I will make