i mean, off the top of my head?
Land? it's here. in the us. reparations shouldn't be more fiat currency, but Land. it can be negotiated for because america doesn't want a civil war. even if they think they can win, the losses aren't worth it when they can trade land instead.
Shelter? What do you think the wood is for?
water? find a spring, lake, or dig/drill a well. water is and should be FREE
power? im no expert, but im pretty sure the sun is providing us with FREE energy on a daily basis. go solar or use wind turbines.
money? who needs it when you have sustainable food, energy, and shelter.
equipment? who says we would go empty handed? buy equipment in advance preparation for the move to the new Land.
citizenship? it will be an independent, sovereign nation. any black people that want to stay in the US are free to do so. anyone interested in building their own country with real freedom, can come with.
who leads? i dunno, start a collective with people who show the ability and the competence to do so and go from there.
it's not unimaginable at all, you need to travel and see that other countries have solved all of these problems and then some, without any aid from the west/US.