First, we are deeply sorry you are facing this. No one should have to navigate a terminal diagnosis while also separated from the person they love most.
On early release, the honest answer is that there are no formal parole provisions in the federal or most state systems that allow early release based on a family member's health. The compassionate release and medical hardship provisions that exist are tied to the inmate's own medical condition, not a loved one's. That is a painful gap in the system that many families have encountered, and it does not make it any less unfair.
That said, it is worth having an attorney reach out to the prosecutor and the sentencing judge directly to explain the circumstances. Judges do have some discretion, and while a formal mechanism may not exist, a compelling humanitarian argument presented by counsel has occasionally resulted in sentence modifications or expedited consideration of release options. It is not guaranteed but it is worth pursuing.
On the transfer, this is the more actionable path. Your husband can and should petition his counselor immediately requesting a transfer to a facility closer to your location. The petition needs to explain the circumstances clearly, including your diagnosis, the fact that you have no other support system, and the specific facility or region where he is requesting to be placed. A clean disciplinary record makes approval significantly more likely, as does bed space availability at the receiving facility.
This process takes time, so starting it now rather than later matters. His counselor is the first point of contact. The petition should be in writing so there is a documented record of the request.
You should not have to go through this alone. Reach out to aid@inmateaid.com and let us know your situation. We will do what we can to help point you toward the right resources.