I think it should be 48 hours to pay and if you don't you should get kicked out so someone else can take their spot as a backer.Is there a way for the payment to be "on hold" until the whole price is reached? Or is it how things are done already?
Because if that can be done, it would help for people to be able to join and pay it already, sowe have a better idea of how much is missing. And if the price isn't reached in full until a certain deadline, those who already paid get the refund.