What it will take: Successfully managing a large household requires keeping strict track of your money and giving up a lot of your wants to pay for and make room for all of the needs that will exist. You should "be willing to downgrade your current and future lifestyle, indefinitely," said Julia Chung, a financial and estate planner with Facet Advisors in Langley, British Columbia in Canada. If you havent been keeping at tight leash on your spending previously, get ready you will need to now.