HVAC costs for starting from scratch

[Ruth Lyons]

Question...I'm just looking for a price range (high and low) so I can put an estimate in my rehab budget on a house. It's a 4 bedroom, 2 bath colonial home built in 1964 with no basement (does have attic space) with window air conditioning units. What does it cost to ditch the window units and install an HVAC unit from scratch...all the duct work will need to be built and placed?