Doesn't work like that. In fact, custody is far more likely to go to the mother whatever, and a very ambitious man who is willing to put job over children's needs, such as a stable home and consistent schooling, is likely to be dismissed straight away.

He has to provide reasons you can't raise the girls on your own. For example, mental illness, instability, drugs, you have to physically and mentally be incapable for that claim to stand up in court.

Best of luck to you.