I think it will depend on what kind of lifestyle you want here, what nationality are you? If you are western I would say you wont save much out of 20k, you would want a decent apartment / villa, good social life, weekends away. If you are the sort of person who is just coming here to work work work, then you will be able to save more. It will be trial and error until you find the balance that suits you and the lifestyle you want to have.