Maintenance cost during and post diverce

Will property belongs husband also matters in deciding maintenance? 2nd thing, my wife fought with me couple of days back. Currently, child custody is with me. she wants him to take to her native now itself. but he is studying in blr one of the school. How do i defend legally that if my son is taken away now, his study gets affected. My son is 7 year 11 months now. Please let me know if any more answer are required to address my above question

the Supreme Court of India has established a benchmark sum of 25% of the husband's net monthly income as the sum that should be awarded to the wife.

If husban is jobless, how maintenance will be decided for wife and son