Semimature-tree production in containers

I am from South America and I am interested to start growing big trees in containers, which is an almost unknown technique around here. Thinking mainly in above-the-ground production (since temperature seldom drops below freezing point) although still flexible. I have done some research in airpruning, (smart-pots, Rootmaker, Agroliners and so) and seems the way to go....

Any experiences to share on the subject?

Do you know of any experienced growers in TX, OKLA, ARK you could recommend? Will be travelling to the US soon and would like make a few visits if possible...

Many thanks for your kind advice,