How do you afford to study internationally? (outside the US)

Hello, I am looking to study electrical engineering. I would love to study in New Zealand and eventually immigrate. I have a 4.0 and an associates degree. But I’m going back to school after a 7 year break.

From what I’m seeing universities abroad are very expensive and require that you pay up front. I don’t even know where to start. How are international students managing to afford to study internationally?