Pneumonia from fungal lung infection.

My mother has metastasis spread to lung. She was receiving chemotherapy regularly. The last PET scan showed partial response. When cold weather started she suddenly started lot of dry cough. When admitted she got better and got discharge in 2 days . But again started feeling weak and breathless in a week. After admission she felt more breathless and shifted to ICU. In ICU one day felt better but again had to move to NIV support. She is on NIV support from 3 days with 80% fio2. Also fungal infection is detected by 3rd day. Viral infection is ruled out. She is on antifungal agents since. Initially doctor thought she will need mechanical ventilation but nowadays not saying so. Doctor is saying antifungal takes more time to work. How much time will she take to recover if not ventilated? What are chances to get out of it if her condition is stable from 3 days?