We are accepting donations from every member, not minium or maxium amount, everyone can contribute what they want.
Since the FC bank permissions are quite useless at the moment we just make anyone who wants to make a donation to send the gil via Moogle to me (the leader) and i add it to the FC Bank.

I keep the company board updated with the amount we have raised so far and a Google Drive excel document open to everyone in the FC that shows how much has been donated by everyone so that they can check that nothing is being taken. If someone wants to make an anonymous donation we just put a "Donator A" as the character name in the document.

Our goal is to raise 4 million with that method and we are currently in 2'5m. (We are a quite small FC so we are happy with that number so far, aiming for a middle size house)