As a Retired ICC cetified Building
Official & state licensed Plumbing Inspector (35yrs of inspection experience) they really need assistance on multiple levels.
Such as....
The older houses need:
Asbestos assessments...
Potential lead assessment of interior finishes and plumbing...
Electrical upgrades...
Pier and beam inspector
HVAC upgrade..
Termite inspection...
Energy efficiency upgrades
Watched show 2/5/19 didn't hear or see any mentioned.