As a juvenile I think this snake has a better shot at surviving than an adult will. That said, your friend is in the unenviable position now of battling mites without being able to use pesticides so as not to exacerbate the snake's neuro issues.
The snake may also need to be tube fed with a thin slurry of something like Carnivore Care a few times a week, which will also help ensure it stays hydrated and aid in its recovery.