Client Billing - Now want to transfer

I believe I am reading this right and just want to confirm.

I have set up client billing for hosting on a project, however now they are convinced they can manage the whole site themselve. (Great! I am happy to turn it over to them, but it looks like I can’t transfer a site at it’s current stage. Also they have paid for hosting for the whole year, so I can’t expect them to re-pay for hosting if I were to duplicate their site then transfer it.

Let me know if there are any recommendations?