Well, you can become a divemaster, but normally this does not pay well. You may be given food allowance or free accommoation and you get free dives. You may get commission from kit or courses you sell.
As an instructor, you earn commission on all courses you take, so teach more, earn more.
If you are an advanced instructor, you can teach more types of diving (wreck, deep, underwater Photography etc), so you can teach more and earn more.
You can take this all the way to course director and even own your own dive business.
There's always commercial diving - this pays well but takes a lot of training and has a lot more risk attached.
You can be a rescue diver for police, fix pipelines for oil rigs, search sunken wrecks like wreck detectives....
There's plenty of different ways to earn money, depending on how much you want to put in.
As I heard once - to make a small profit in diving, you must start with a large profit!
I'm a PADI divemaster and I do it for the lifestyle, not the money.
Dive safe!
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