Has anyone got a possible timescale for when we could see kakapo in permanent captivity or abroad?
Not to understestimate your desire to see one, but I still think you might have to journey to NZ to accomplish that, even in years to come. I can't see them being sent abroad for the reasons mentioned above. Also remember Kakapos are almost exclusively nocturnal so a poor exhibit for zoos generally unless kept in expensive nocturnal housing, and even then probably very inactive as they are slow, ponderous birds in their behaviour. For most people (excepting Zoochat folk and zoophiles obviously) they wouldn't be much of a draw either.
But as stated previously, as the population(hopefully) increases, the chance of occassional individuals coming into captivity in New Zealand probably becomes higher.