I’m an OW diver w/nitrox cert and would like to further my training all the way up to instructor. This would be done all at once over the span of however many months it would take to complete the courses. Could I get advice on where to go for world class training that wouldn’t be as expensive as what I’d likely have to pay here in the USA? SE Asia would likely be top of the list due to the cheap cost of living, but if I could get the opinions of those that have knowledge and experience on the subject, I’d greatly appreciate it!!