These costs are based on a single parent family of 3, living on a budget. Mortgage for 4 bed home- £600pm. Rent for 4 bed home is approx £1,400. Utilities - gas/elec/water/rates = £500pm. Food + household items = £500pm. Car maintenance + petrol = £180pm. Potters Bar is located just north of London. Housing is reasonably priced and transport easy with mainline station to London and major motorways nearby.