I’ve considered entering the dive industry myself when I came across two interesting ebooks that helped me understand the economics and direction the professional industry is heading:
Overview of industry: https://www.amazon.com/dp/B09971LJQZ How to build a career as dive instructor: https://www.amazon.com/gp/product/B09FRFGJ2P (repeats a lot of the data from the first book, but helps to understand how the instructor side of things can look like)
As with everything take the input with a grain of salt, but the data provided and context helped me to come to a decision within two days for around 20$.
Make sure you do your homework before trying to buy a dream. Every business needs work, and you’ll want to make sure you know what you’re getting into. Especially if it’s a market you’re not familiar with.