Mo@#$%^&* ..need A/C and Furnace replaced

I feel for you guys, my house needs a new furnace, the old one it totally inefficient.
My home is over 100 years old, and the furnace is a coal stove converted to gas, I have not even lit it for 20 years, installing a new furnace is not a hard job, but getting the old cast iron stove out, that was put in the house, then the house built around it will require some work.

Also I am waiting my turn with a contractor to replace my roof, it is the original slate roof, it will run me about 20K to remove it, and replace with tin.
Its a two story house with 45 degree roof.

A big sledge hammer will make small pieces of it. Be aware though some of the system may be covered in Asbestos.