You can try the recurring invoices option, Penny10.
This let's you create invoices with the same items automatically on a regular basis. You can follow the steps on how to do it:
- Click the Gear icon, and then select Recurring Transactions.
- Click the New button.
- Select Invoice as the transaction type, and then OK.
- Enter a Template name.
- Select either Scheduled, Reminder, or Unscheduled.
- Select the Interval, and the Start date.
- Fill out the PRODUCT/SERVICE, QTY, and AMOUNT.
- Click Save template.
I've added this article for more information with regards to recurring invoices: How to schedule recurring invoices.
Feel free to tag my name if you still need my assistance.