Its impossible to predict the time required to reach 1000 crore unless the starting capital is specified.
I remember a joke : One woman to another "I made my husband a millionaire after I married him!"
Second women: "Wow! What was he before you married him?"
First women : "A billionaire: !
So I can make you reach 1000 crore in an month or earlier provided you start with 2000 crore!
Jokes apart , mvkarthik's is a sane advise !