Maybe I'm wong and if I'm please tell me but...

To become a Honest Gillionaire you have to gather 10.000.000Gil ONLY via Levequest.

More or less a lv 50 Battlecraft Levequest will earn 700 Gil (with Speed Completion Bonus)

So you will have to do 14.280 Levequest,
you gain 6 Levequest allowance every 24h,

To become a HONEST Gillionaire you just need 2380 days (just 6,5 years).
I think I'll stay disonest for along time XD


Suggestions:
  • Make some higher Lv levequest, that don't earn Exp but more Gil and "other things"
  • Make the actual levequests earn a decent Bonus Gil if you are already lv50
  • Make the Achievment count even the sell of objects to NPCs, and maybe the Challenge Log Rewards