OP I'm not sure why you are so determined to insist a benefits calculator, with little wiggle room for error, is "made up."
The benefits you are entitled too, given the figures above, equate to a £51,900 salary. Again, that is fact. Not a fancy story. It's maths.
I literally work, housing people with Norfolk CC, and again, you are insistent you can not move. You live in Norfolk. Factually you can. There are many hospitals in Norfolk offering excellent provisions and so many cheap areas. Claiming you'd be too far from a hospital is quite odd because you can't be far from anything ok Norfolk really, it's not huge, you can drive from furthest point to furthest point in under 1.5hrs, so when you factor in the many hospitals within that total distance, you should always be within 20 mins or so of one. Dereham, anywhere in the Fens, Brandon (technically Suffolk) Thetford, Swaffham, Kings Lynn. In fact, unless you're trying to live in Holy/North Norfolk coast, or central Norwich, there aren't many places that aren't cheap because essentially Norfolk is the buttcrack of nowhere. Beautiful, but definitely cheap, and even in Norwich there are estates which you can live on well under your rental limit. You just don't want too.