A room near Cardiff Children's Hospital for a family from a town in the north

My daughter Ruth has been accepted for treatment at Cardiff Children's Hospital in Cardiff, starting on Monday in October. We live 380 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 6 weeks. Two of us would stay: Ruth and me. We can contribute $140 a week and cook for the household if you'd like. Ruth will have some immune precautions, so a clean, smoke-free place would be ideal. A kitchen is a bonus. Thank you. Thank you so much.