with an unique ID per individual to ensure only one miner per person.
If you require a centralised ID system to consider whether people should be allowed to participate, why bother using blockchain technology at all?
If any of this were possible this could give communities with lower income a great entry into blockchain tech.
Maybe, but the money has to come from real economic value, so I don't see what advantage it would give to the people in that area. There would still be inequalities - some people would have more efficient machines than others.
and eventually trade on the international market.
If it was traded on the international market, why would anyone outside of south side Chicago decide to buy it?