Want to know what it takes to build a business? You cant even begin to imagine how hard it is.
Building a business is one of the hardest things you could ever think of doing. You have to think about growing the business, dealing with partners, raising capital and many other things.
Leaving your job?
Think very carefully about whether you should be doing this or not. Leaving a career which is safe is not necessarily the smartest thing you to and you should think very carefully weather this is a smart move to do or not.
The chances of making are all against you
So many things can go wrong. Take it from me, I have worked in finance as well as built a business and sold it. VC's will not tell you accuraly the challenges involved and so its a good idea to get advice from mentors in the same sector who have actually build something.