God, you can't dream of Manipal with 50000 Rs. That won't even pay your one week in Manipal. They will give one list of tests with in 2-3 days you will get 50 K Bill. If any other family member accompanies it will be peanuts. Very sorry to say. Not even NU Hospital. In this case best option is like I said get your Ministry to talk to the Karnataka Health Minister.
Bangalore Kidney Foundation (BKF) fits your bill probably. I think you get 30-40% discount also, on medicines & equipments required on MRP. But you have to buy it. If not the other option is Sai Baba Hospital. This is a Hindu Chariatable Hospital. Fee is there but nominal, may be similar to BKF, but this hospital is huge & massive better than BKF. But BKF is specialized in Kidney. In Sai Baba sometimes same Manipal Doctor may be the visiting Doctor who may observe you, but fee will be 60-70% lower. They treat all patients, irrespective of religion. But again heavy crowd will be there.
Anyway send me the prescription. I have some doctor friends, let me see what I can do. But no promise, I am a busy person. If I find time, I will do. No commitment.
I can give my view of what I know always.