[bgentry]

The ventilation retrofit is likely much cheaper for any home that already has central HVAC. I would know this because I did that exact upgrade on my home and spent <$2500 to have a professional install a high end oversized ERV to replace the inefficient ventilator that was installed per code. If you don't have central HVAC, of course it's much more difficult, but most US homes from the past 40+ years have central HVAC.

An induction stove, on the other hand, would require me to rip open a bunch of walls to run a new 220V line from my outdoor electrical panel (the garage subpanel doesn't have sufficient 220V running to it), remove or shut off the existing gas line, and install a many-thousand dollar cooktop to come close to the cooking quality I get from my modern gas range.