Here is my situation, I am a screen writer/director who is also a businessman. I want my scripts to be produced into movies. I am thinking of adapting my script into a graphic novel and hopefully use the revenues to finance my films. Is the graphic novel business profitable or should I just look into other avenues to raise money to finance my films?
You're getting a lot of "no" but not a lot of "why" so I'll fill those blanks in.
If you aren't an artist with a vast array of talents, and you want your graphic novel to look good, then you're going to need to hire:
A writer (You at least need someone to turn it from a screenplay into a comic script.)
A pencil artist
An inker
A colorist
A letterer
A designer (for the cover and getting the pages ready for printing.)
They all rightfully want paid. None of them have any way of selling your graphic novel.
Some of those people might be the same person. That's fine. But it's still the work of at least six people, so if you know how to do all of these things yourself, you're going to be putting a LOT of hours into your product -- arguably more than writing a novel, with far less likelihood of being able to sell it to anyone.
If you want to make a graphic novel, make it because you love it, not because you want money.