PhD as a career

S

Hi,
I am Santanu from India. I have done my MBA (Finance) from a top 12 B'Scool India. I am also a CFA(US)LeveL III candidate. I am looking for PhD (Finance related)as a further career option. But the thing is that i am married and currently 28. I want to do a PhD from a top business school in US/Europe. I want few suggestions on the following points.
1)How much can i save from my stipend (assuming i stay with my wife)
2)What is the average GMAT score required
3)What kind of income level (approximate) one can have after PhD (assuming i will enter teaching proffession)

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