Although financing for customers would be a fantastic idea, QuickBooks Online doesn't offer that at this time. However, I do see how this could be beneficial to your business. If you'd like, I can submit product feedback to our developer team, so this could be considered in the future.
Please don't hesitate to let me know if you have further questions or concerns. I'll be here for you every step of the way. You can always reach out to the Community or me anytime you find you need help. Take care and enjoy your weekend!