How do i become a fishing guide?

Wow, Johnny nailed it. A BIG thumbs up! The only thing I can add is that it's a good way to turn a hobby that you love into a JOB that you hate.

ahhhhhhhhhhhhhhhhhh yea what he said

Or you could work for an outfitter. That way you are using a minimal amount of your own money. You won't have to run it like a business so much then, just show up at work and take people out fishing. You can still bank hundreds of dollars per day easily. You can read about what it takes to become a fly fishing guide for trout at the following link. It would all still be accurate for the salt water fishing guide: http://troutster.com/want-to-become-fishing-guide/