I would like to create an instance which runs on a dedicated host using boto3 if possible.

The boto3 function create_instances() has the parameter Tenancy and allows host:

Placement={
    'Tenancy': 'host'
}

Does create_instances() create both the dedicated host and the instance?

And when I terminate the instance, do I need to do anything else to stop getting billed? Does the host itself need to be ‘free-d’ somehow in the Management Console?