@snoots - Mutual understanding between the divorcing spouses can be and more precisely shall be part of the MCD petition to protect the interest of financial beneficiary of the agreement. After the first motion, second motion can be moved from six months to 18 months from the date of first motion. If you believe the promise of your husband to pay the instalment dues after obtaining divorce through second motion, you can go for second motion at any time between six to 18 months from the date of first motion. If you have scientilla of doubt about him to keep his promise, then you talk to him and arrange the instalments in such way that the entire amount is paid latest by at the time of second motion.
@Rajeev Sampat - your earning is only Rs.40,000/- and have no other source of income and your children are school going, then Rs.10,000/- is a decent amount is undoubtedly decent amount.