A couple of things.
It would be noted up front that all non-donated money is refundable if anything should happen to this board/club and/or the membership concept. (basically covering any unforeseen circumstances)

Donations could remain anonymous, if people think there might be an issue of resentment or superiority, as the Firepower number doesn't have to show who has donated. But if you feel that we aren't much of an elitist, snobbish bunch of people, I can add a + after the Firepower number to reflect who has donated (as a reminder to the person later, and makes it a little easier for me too).