Salam Alaikom,
Rizq is not a quantity. It’s quality of life. A person may have more money, but there would be less Baraka in that money. An example is singers/musicians. One hadith states prolonged exposure to singing leads to poverty. Singers are very rich. But according to studies, they suffer from one of the highest rates of depression and suicide. So Rizq means quality of spiritual life for you and your children. In fact sometimes more money could be a test/curse for the person.