I like the ideas you brought up. Particularly the one about raising FC funds for housing. Though I would suggest a revision on what you originally stated. Say for instance it would be provided as a buff for the FC to implement,but instead of it being a tax or something deducted from players actual gil it would probably be better if the buff did something more along the lines of for example : In a dungeon you earn 90 gil from killing this one monster, 5% of that is calculated and generated as extra/bonus and deposited into FC bank. The player keeps the 90 gil and the 5% bonus generated benefits the FC at the same time for them running the dungeon/killing monsters,etc