Subscription for certain variants

I am not delivering products at regular intervals using subscriptions. What I am doing is giving the opportunity to my clients to subscribe to a car, and not pay the full price. They just pay when they use it.

It means they can pay a daily price and be charged daily

A weekly price and be charged weekly

A monthly price and be charged monthly.

The issue I am having is that I have created the variants with the different prices (Daily, weekly, Monthly) and now I want to have a payment plan attached to each variant.

For now, I can see only a payment plan attached to the product and not its variants, meaning that if I create a daily payment plan, my customer is charged the MONTHLY price DAILY, instead of monthly.