Asbestos duct work to furnace

[Pat Jackson]

Before I go any further, I'm contacting a local HVAC guy to give me a quote and some ideas.  Thought I'd throw this up here to see what everyone else's experience is.

I looked at a 4 plex with an OLD furnace and asbestos duct work (pictured below).  I passed without getting a quote for some other reasons.  Now I'm looking at a duplex with the same thing, super dated furnaces and asbestos duct work.  I'd like to buy the duplex and rehab, including replacing the furnaces.  I have no idea how this asbestos duct work works though.

• Can you just hook up a new furnace?
• Does all the old duct work have to be removed?
• I imagine the remediation with asbestos is super expensive, right?

I'll post what the HVAC guy says, whoever wanted to see what others have seen.  This house is in Missouri.