I second that if you are unable to provide adequate conditions for a ball python to live in and not just survive for whatever reason, you should do the right thing and surrender them before you end up frustrated and guilty feeling because something unwanted happened.
You must provide minimum condition for temperature and humidity. If you cannot provide that externally via the temps in your house then you must provide it through heating means in the enclosure.
What you are doing now is causing harm to these snakes and how you keep them now will not be conditions that are survivable. These are not temperate climate species like some corn snakes, they are subtropic snakes that require a specific range of temperature that the vast majority of people can not provide simply by being lucky enough to live in a region of the world that mimics their native conditions.