Mintflavour,
What's been said above are all worthwhile things to check. For me personally one of the most important things would be the quality of the instructor. It is (s)he that will be training you so they must be of the highest quality, have as much experience as possible and be interested in your progress. It's not going to be the easiest thing to find out but a lot of your questions IMO should be focused on determining the standard of instruction at a school.
Good luck.
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