Making a thorough investigation before making a decision

I had indented to marry a lady then during our conversation after couple of months before nikaah I came to know that she is greedy and I fear that she would do the way she likes to do and will not listen to me because I believe she is a professional excusor. I strongly feel that this marriage will not work. I refused once then through a third person we sorted out and tried to re-continue. Now again I am feeling the same situation. Should I go with this marriage or not? I am confused. My family says in this country you don't know people are very different. That lady was married before and got divorce from her husband in a couple of weeks. Please guide me. She said she did istkhara and it was ok. I did but got nothing, no feeling etc. still same.