If income is not fixed, then the expenditure can be fixed. Try to check back, what are the expenses of your family, from the smallest to the largest. Sort from MANDATORY, NEED and WANT. Of the many expenses, take the MANDATORY only.

If it turns out that the expenses you do need for a month of Rp 2.5 million while the very obligatory expenditure of Rp 2.3 million then you should choose to put the mandatory, even though your living standards decreased somewhat. Once you meet the numbers, live as cheaply as possible and the discipline to live for only Rp 2.3 million per month.