Considering moving to Mumbai. Any estimates on rent?

Hi guys, I am originally from Delhi but have an option to move to Mumbai where most of my friends will be for our jobs after graduation. I actually am comparing Delhi and Mumbai in terms of cost of living and quality of life. I’m sure quality will be better with friends around but living in Mumbai from what I have heard is expensive. Can someone help me with actual numbers for rent and hopefully leads on brokers? Some details: my office will be in BKC but we will spend most of our time in client offices (which I assume will be in commercial districts of the city, like Cyber City in Gurgaon). The options for renting for this particular setup I asked around was near Bandra or otherwise in mid Bombay. Can someone help me with rent prices for both of these places for one person? What other costs should someone planning to move here be cognizant of? A general monthly expense for basic necessities from your own experience would be helpful. Also, how do you like working and living in Mumbai? Any opinions on the traffic situation? Thanks a lot in advance!