I'm thinking of quitting my good paying job with nothing else lined up
Why not wait until you have a back up plan?
I'm sure I can make a good profit from my talent
I'm glad you're confident in your abilities.  However, it's important to have something lined up when you quit a job as jobs are what's gonna allow you to pay your bills.  I'd suggest staying employed until you have a fallback job lined up.
People who aren't financially stable are trash in my opinion.
That is why I am trying to convince you that it is not good to quit before you have anything else lined up. You do not want to have to worry about paying your bills and stuff like that.