Hi Pat,
I’m only into my first year of kiteboarding

, so I’m certainly not an instructor. Nevertheless, here are a few responses based on my previous experience with my instructor:
1. Good communication skills and being able to get along with all sorts of people is of course hugely important (this is where experience with teaching English will definitely come in handy). The student will learn best if they get along with you. I was lucky enough to have a good instructor.
2. If you get IKO accreditation, then the country in which you received accreditation shouldn’t matter at all.
3. Go where the work is. Most places are seasonal in terms of the number of kiters out on the water, so if you like travelling, go to where the wind is (if only I had that luxury!).
Good luck with becoming an instructor.