To make a long story short, the final inspection, according to this inspector, revealed some major problems with the footings, floor joist, ac duct work, water heater, and he wanted me to replace a 4" cast iron sewer pipe out to the main(because he suspected it could go bad in the future) and no insulation under the flooring in the crawl space.

Collingswood is one of those 100 yr old towns where the houses all have 12 inch baseboard and wood floors, which run the heating bills up, and not all houses have central, or even the duct work for it.

The $5-6k prices included the air handler and maybe the ductwork as well.

Oftentimes the 2/1 and 3/1 houses don't even have the ductwork for central heat and air.

Adding AC might be one, but with mini-splits, it’s less enticing to add duct work.

New Attic Ductwork - $2,500Thanks!

Most homes in this area (South Carolina) have central heat & air HVAC with duct work.

For example, if the house already has a furnace and ductwork, then adding central air won't be as expensive as installing a whole new HVAC system if the house curently has a boiler.

No one except the mold remediation salesman is onboard with paying $1800 to clean the duct work.

Do I need to remove the drywall, insulate the ductwork, and patch it back up again?