How much time it would take to get divorce

Hi All, I have been married for 3 years and my wife was a master degree student during that time she was residing in her home and in this three years she has hardly stayed in matrimonial home for 5 months max. I am the only son to my parents and my wife wanted to live sperately leaving my parents to which i didn't agree.unfortunately i have lost my father as he was a cronic dialysis patient. I had to leave my job for this to reside in my native hometown.my source of income is from rental from a property.how much alimony should I pay to my wife incase of divorce. All the properties are in my father's name. I don't have offsprings from this marriage. My wife was pregnant and she told she wanted to see her parents i have sent her and then she hasn't returned to matrimonial home since the Me and my wife had a huge quarrel and then My wife is residing in her home from last 1 year and no contact from her since. We have sent our relatives for reconciliation but she and her parents aren't welcoming for this.