So marriage is only important to get kids? if she is not married until she is 30 she wont have kids, that should not be a Reason for getting married.
Women can get married whenver she feels that she is ready for a life long commitment, and yes there are Lot of sacrifices which come along with this commitment, but well its part and parcel of a womens' life.
I don't support early marriage, infact I feel marrying below the age of 25 is like child marraige...either the people marrying lesser then 25years of age are too restless or desperate....