Hello there, @cmeisel. I recognize your need for the special payment terms in QuickBooks Online (QBO), and I'm here to share a few insights about this.

I can see how the benefit of being able to generate invoices with special payment terms would aid you in managing your transactions. However, tracking them based on your example isn't currently an option in QBO.

You'll have to manually send invoice reminders to remind your customers of the due dates. Then, manually record their partial payments. This way, the system keeps track of the remaining invoice balance. 

Then, you can pull up the Customer Balance Summary report from the Reports menu. This helps you monitor your customer's remaining balance and manage them accordingly.

On the other hand, we take your suggestions as opportunities to improve the various features of our products. Therefore, I would encourage you to send suggestions or product recommendations.

Your valuable feedback will be forwarded and reviewed by our Product Development team to help improve your experience while using the program. Here's how:

1. Go to the Gear icon.
2. Select Feedback.
3. Type in your recommendation in the Share your feedback field.
4. Click Next.
5. Follow the on-screen instructions to complete the process.

Also, you may want to check out one of our Help pages in case you need a reference in organizing and managing invoices using QBO: Invoices and payments help for QuickBooks Online. It includes topics about customizing invoices and progress invoicing, to name a few.

On top of that, I'd also recommend visiting this page to keep you updated with the latest software improvements and enhancements with QBO: Customer Feedback for QuickBooks Online.

I'm all ears if you have other concerns about managing invoices and payment transactions in QBO. You can drop a comment below, and I'll gladly help. Take care, and I wish you continued success, @cmeisel.