Chimney Removal & Staircase Opening Support

We are converting our loft into a habitable room and the new dormer is almost ready now. However we've reconsidered the original place of the new loft staircase and now we need the front chimney breast... (Budget: $30 - $250 AUD, Jobs: Building Architecture, Building Design, Civil Engineering, Construction, Drafting, Exterior Design, Structural Engineering)