Furnace filters, duct cleaning, dryer vent cleaning, chimney cleaning, fridge coils, swamp coolers, gutters, ac, sump pumps, plumbing inspection etc etc.We are toying with the idea of paying for a separate independent inspection annually. 

Most expensive repair was an $80 coil.

Can someone say they sleep better with a 15' python coiled around their necks and get documentation from a voodoo doctor in Beverly Hills stating so?

Last night he checked on the house and walked into a disaster...With the cold weather conditions we have had in NY, a faulty coil in the furnace, a pipe burst in the attic.  

Defective coil leaked after a year.

It is an older home and the air vents are the kind without filters so dirt is bound to be sucked into the coils. 

Here is what I would budget if I were you:New furnace only, about $1800.New furnace, air coil, and condenser, about $3500.Entire new HVAC system, including ductwork, up to $6000.

That should include a new furnace, coil, compressor and ducts.  

@Andre KeyThe commercial air scrubber linked in the previous post will be what you need- BUT, in addition, you will need to clean the A/C coil and probably replace carpet, duct work - cleaning won't help - I had a smoked house and we re-painted every surface/primed with kilz, replaced carpet and cleaned coil and ducts--- smell was improved, but not gone until we replaced ducts- The air scrubber is a great starting point with a new project - it will remove 90% of the smell before you even paint-Good luck

I can thin set backer and shoot it down with a coil nailer faster than someone can screw it down without thin set and know that my system will be more forgiving to the existing conditions of the floor.