Automatically Creating Invoice For Customers Based On Set Parameters

I have a database that I will use for invoicing, but I would like it to automatically create an invoice for customers based on parameters set for that customer (e.g., monthly, biweekly, etc.). I have tables containing the customer information, the item they are being billing, the price, etc. I want to be able to have access automatically create the invoices and add them onto the invoice table each month.

Maybe there is a better way, but I thought that if I created a query for all people that are billed biweekly and all people that are billed monthly, that I could run the queries when applicable and then somehow write a macro that would go through the list of customers and add each of them to the Invoice table and add an autonumber. That way I could click run query, run macro, and then do my invoicing. I don't know if that is the way to go or not.