Hi TB and others:
Just a thought and point of view on this subject
Be sure to assess the state of the structural timbers before you even think forward to another level
If the structure has rotten parts dismantling will be a whole lot riskier undertaking, because as you remove the wood pins to insert temporary metal fasteners the joint may not like being loosened up and may fall apart or fail as you do the sequential removal further down the road
definitely carry good insurance coverage you never know where things may go as you move forward with the project.
make sure that you have an agreement in writing that covers as many controversal aspects of the removal and cleanup, also check with the local fire deptartment, and municipal offices to see what they have to say, you may need their input.
Good luck and be careful
NH