How do other customers account for a sale and leaseback?

Summary: We are going to be doing a sale and leaseback of some properties, and we are having to uniquely account for them.

In this situation, we would need to make a schedule where we get a specific amount as a liability at end of the lease because we would want to set the liability of a lease not based off the monthly payment, but instead based off a portion of the purchase price allocated to it. We have looked into this and it appears that the system always sets the liability to $0 at the end of the lease. How are other customers handling the accounting for these situations?