Even though your experience is good enough, you didn’t give your complete profile to evaluate your candidature properly. A score of 600 is way below than the average of any top school you have mentioned. A good score (700) complemented with great application will give you a chance of getting an interview from these schools. I recommend you retake GMAT and focus all your energies on a 700+ score rather than applying to all these schools and getting rejected.
Having said that, your gender and your non-IT profile will help your application. I understand your family and age scenario. Your age will be working against you. If you don’t have time to retake GMAT, focus a lot on your essays. I am confident you can get into one of your target schools esp IE or Oxford if you can write good essays. Be aware few schools don’t consider reapplicants favorably.
Also, you might want to go through the following article:http://www.interviewbay.com/blog/women- ... ess-school
Mock interviews and Application reviews by Alumni