Dear Ram,
As you stated that you friend has been living seperately since 8 year.
Question arises:
1.) Did your friend's wife left the matrimonial home
a.) herself without any provocation OR
b.) after ill treatment by you friend?
2.) Despite this seperation did your friend and his wife continued to have physical relation?
See my advice as per tentative answers:
A1.a) This is a ground for divorce for HUSBAND and it'll be called "Dessertion" by his wife. Your friend might not even need to pay any alimony, at all if this can be proved that the wife deserted the husband without any just cause. However, seeing the economic condition of the wife the court may grant maintenance or final alimony based on your friends capability.
A1.) This is a ground for divorce for WIFE and it'll be called cruelity. The court would come down heavily if wife could prove that she was ill treated and then thrown out and never taken back. The alimony (final settlement amount) would be very high in this case.
A2.) If YES, then court may not grant divorce at all as your friend continued to act as husband.
A2.) If NO, then court shall presume that it is a breakdown of marriage. Then it would depend as how much alimony could be granted.
A good advocate could pull out your friend easily in very less expenditure. Rest could be advised after more details only.
//peace
/S. Vashist