Oh boy, only one helpful reply in this thread so if someone in the future wants to search for an answer he/she has to crawl to all of this.
Well took me about 16 hours to import all the books and 2 days to categorize it .I used the GUI to do so, as it seams calibre doesn't like files above 200 mb takes a lot more time.
I dont want to be rude but this is the best policy in my opinion, if you don't have something helpfull to contribute then dont.
P.S - Books are all legal.
Thanks for the help.