I need the facility to have a 'main' customer and under that main customer will be a number of 'buildings'. It will make life simpler when producing statements for customers. A number of my customers have multiple buildings that I have to invoice to a sub client. But when chasing payment I have to contact the MAIN customer to provide a full list of everything outstanding by building on their account. This would be a very appealing facility to lots of property companies such as ours I'm sure.