I stayed at a place called Eight Bells Inn and it was $225AUD per night at the time which included breakfast each morning. We ate dinner there each night as well which cost about $135AUD for the two of us. Lunches we ate out wherever we were in Bath itself or out on the road somewhere. On top of that was the cost of getting into attractions we were interested in which was usually between $30-$40AUD. Fuel and hire vehicle I've left out of the suma.
Hopefully that is a decent enough answer to what you were asking.