however, the cost of reunification will be much,much more - Nork is in a far worse shape than the GDR. Also, the GDR was bad, but the Norks replaced communism with junchi - essentially Kim is god.
The south Koreans are, on average nearly a foot taller and with a higher IQ due to better nutrition.
it would take two to may be three generations for reunification to be complete (note that germany still has signs of separation two generations on)