Hi Sirenita and anyone else that is looking for advice on this subject cos its an old thread.......
3 years ago I left my job in the City of London, rented my place and moved to Mexico and then Utila, Bay Islands, to work as an instructor. Its working for me, and very nicely too. I am now Manager of a large shop here with over 400 certfications and 1000 plus dives. I love my life!
My advice for you is to work hard, get yourself qualified beyond just OWSI (get your MSDT) and learn a language other than English if possible. You also need to select the place you work carefully, especially if you only speak English (as I do).
You will not make a fortune, although I have one friend earning $4000 USD per month in Caymen, but you can certainly make a living, lead a very pleasant life and be the envy of all those you leave behind. You will keep a young attitude to life, avoid grey hairs and be happy... but never be rich.
If thats what you want then go for it, fasten your seat belt and hang on for a great time!
Thats my POV.... good luck... and just one thing, it doesnt work for everyone!
Best of luck
Simon