bossing profit and equip upgrades.

Daily Gollux, daily Commerci, weekly Empress x2, weekly Chaos RA (all 4 bosses), and weekly Hard Magnus makes me roughly 25-40b a week depending on drops, so yeah, it's way more than enough to get by without having to spend a dime. I split everything but Empress 50/50 though so if you're going with a full party (I have the luxury of multiple computers with mass mule accounts for this) or just being a Bind mule, you'll make a hell of a lot less, obviously.