When would you risk leaving your good job and start up your small business. What would it be ?

when i get both , money that gives me the ability to start my own business and and experiences , knowledge i need to start it

Of course there is a risk, But as you know there is no gain without a risk.

Indeed you will success by grace of Almighty.

God help those who help themselves.

I think the idea of the project  you believe it will succeed . Then the detailed feasibility study

then  the entrepreunship  spirit are90% of what you need

Money for the start, 'know how', bussiness contacts and a first project which wil boost a company at the beginning.