A room near Dhaka University Hospital for a family from a village four hours away

My sister Parvin has been accepted for treatment at Dhaka University Hospital in Dhaka, starting on Monday in August. We live 448 km away in a village four hours away, 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: Parvin and me. We can contribute $10 a week and cook for the household if you'd like. Parvin will have some immune precautions, so a clean, smoke-free place would be ideal. A kitchen is a bonus. Thank you. I never thought I'd be the one asking, and I'm grateful for every bit of support.