I fear that you have not fully understood how rental and fashion businesses work. And so I have some research suggestions.

By studying rental businesses you can work out their business model (where are their costs and where do their revenues come from). Go to Kennards Hire and work out how they get customers to return regularly. What triggers a purchase? How do rental businesses acquire customers and how do they keep customers coming back?

I think you can learn a lot by following and researching other clothing / fashion rental businesses.
here are several for you to study.
Try to answer these questions