A room near Kathmandu Transplant Centre for a family from a town in the north

My son Sagar has been accepted for treatment at Kathmandu Transplant Centre in Kathmandu, starting on Sunday in August. We live 357 km away in a town in the north, 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 3 weeks. Two of us would stay: Sagar and me. We can contribute $20 a week and cook for the household if you'd like. Sagar will have some immune precautions, so a clean, smoke-free place would be ideal. A kitchen is a bonus. Thank you. Please ask me anything in the questions section. I'll answer honestly and quickly.