Please look at adding the option of a payment plan. It would for sure have to have parameters.

Some of the below parameters are just some I can think of now:
- Term of payments
- Free or interest rate
- Apply only to certain products/services
- Agreement and contract
- Option to deliver product or services before or after payments are completed
- Late fees
- Add services/processing fees
- Increase late fees each time a single account is late on said payment plan and the ability to set at which late number of late payment they start to get fees added