Removing an exterior brick wall

Hi all, before I begin, I am not looking for a go ahead to do this or confirmation, just advice. I will be hiring a SE if this is possible.

I have an all brick house I just purchased. It has a large addition done to it in the 70s that extended the back part of the house. When they did this, they left the old exterior brick wall of the house inside. So, there is a brick wall spanning the length of the house with two old sliding door openings inside that are now doorframes. I am positive these walls are load-bearing due to being old exterior brick walls to support the roof.

My question: Is it possible to remove an old exterior brick wall that is likely still supporting the roof truss ends for the original house build with proper support and such?

Is something like this ridiculously expensive?

I have only seen talk of interior walls being removed but nothing like this. Thanks for all advice!