Family housing near Paris Children's Hospital: 4 weeks

My father Henri has been accepted for treatment at Paris Children's Hospital in Paris, starting on Friday in November. We live 331 km away in a rural district, and hotel costs would use up what we have set aside for the treatment itself. We're looking for a room, granny flat or short-term rental within about 30 minutes of the hospital, for 4 weeks. Two of us would stay: Henri and me. We can contribute $100 a week and cook for the household if you'd like. Henri will have some immune precautions, so a clean, smoke-free place would be ideal. A kitchen is a bonus. Thank you. Thanks for being kind about this.