4 rsjs for a small wall removal?

Hi everyone, we want to remove an internal wall on the ground floor of our house. The wall is about 1 meter wide; and when we opened up the floor, we saw that the solid part of this wall is about three bricks wide. It sits on a floating floor. We are in a terraced house. The engineer said we have to install 4 RSJs in the form of a frame for removing this! This will turn out to be a very expensive job; as the one frame goes down under the floorboards, one on the ceiling and two on each side. for the one on the floor, a concrete foundation need to be put. I wanted to ask if you have ever seen such a thing, is it an overkill, and what would be estimated cost for a job like this in London. the engineers costs is already more than 1000 at this stage for all the visits he did...