Lease-purchase rental property to a family member

[Jose Mendoza]

I am trying to understand how capital gains would work on the following scenario. I have a rental property that I would try to do a lease-purchase deal for a family member. They will sell their home and parents home and with proceeds provide a down payment, The rest of amount would be a lease-purchase. I still do have a mortgage on that house, so planning on getting those monthly payments to pay existing mortgage. Therefore, what would be the capital gains tax implication on this?