How much capital investment is needed to open a maternity and baby store? For investors, opening a maternal and child store requires adequate financial planning. If you want to open a comprehensive maternal and infant store, you will need more funds. You need to consider the cost of leasing the store, decoration expenses, purchase payment, staff wages, etc. Here is a detailed introduction to how much funds are needed to open a maternal and infant store. A question of investment. Cost of renting a store The first thing you need to consider when opening a maternal and child store is the cost of renting a store.