Let me know what is your budget & when you want to come, I can try & help you find a reasonable stay according to your Budget. Hotels can be very expensive in Bangalore. Also remember Manipal Hospital is a commercial hospital, they will find every way to suck what ever money you have. They can make you bankrupt. There is one more NU Hospital, I can try with my connections to get through this hospital. It's an above average hospital, don't know how good it's compared to Manipal. There is also Bangalore Kidney Foundation. This will work out the cheapest, since it's run under a trust. I can also try & connect here, but atmosphere of the hospital is average. The doctors & staff also will not be very cordial, since there will be huge patient crowd.
If you want to go for Manipal, try & come with a letter from the Gov.t or ask someone from the ministry to help you out by talking to the Hospital authorities. Best is to talk to the State Health Minister. Otherwise, It's an Upper Middle class/Rich man's hospital.
Let me know your budget & how bad is the condition & then I will see how I can help.