How much will it cost?

depends on your definition of a family of 4 is would it be 2 adults and 2 kids or would it we just 4 adults now if the family included children then the cost would be significantly higher here in the usa, especially if you are talking about young children my sister has a little one and i know she goes through diapers like crazy and soon she will be growing out of her clothes so that will be a good expense with food and clothes that can be a good amount per day tough to estimate what it would be but if its just adults you probably only have to worry about household bills like electricity and water and credit cards and rent or mortgage but when my dad worked my mom with the bills would go through almost 4,000 a month.