Your nationality plays a big role when it comes to this dive due to visas and travel restrictions.
Some countries are easier to access than others depending on what your nationality is. For some countries, you may need to apply for a visa well in advance, have a lot of money in your bank account, and go through a long application process to be able to work in the country. For other countries, you may be able to enter, stay, AND work visa-free. 
If you truly wish to pursue this dive, you must take this into account, but don't let it discourage you. You CAN live abroad if you really want to.
Remember the Break Diver's Creed: No Rules. No Excuses. No Regrets.