Piece of aluminum trim coil, some construction adhesive, some screws and silicone for the exterior, then replacing the drywall inside.

Even Cook Co IL (a notoriously tough place to business) will forgive the fines if the new owner has a plan to fix the property and solve the problems which are usually public safety related. 

If they're not smooth top, they have the same drop pans and coil crap to deal with as any other range so not any easier to clean. 

It's ritzier than electric coil ranges(which look so bad they make you wanna barf, not a good thing when you're about to make dinner.)The induction ranges cook food faster, and I believe they're safer.

Radiant heaters or fan coils (air handlers)?

For the HVAC I would have it cleaned by a professional company, make sure to have the ducts sealed with a smoke sealer product and they thoroughly clean the heat exchanger coils and squirrel cage blower.

I prefer them to have electric stoves, and electric water heaters--two less things for them blow themselves and the other units to Smithereens.Those coiled gas lines do leak from time to time, and the other things I don't like in the units are candles (open candles or religious candles in a colored glass from the local grocery store) or live Christmas trees.

There's also a battery powered trim nailer (ryobi one) which is convenient because then you don't have to mess with air compressors.

I did give Ryobi a second chance with a brad nailer and battery drain auger which work great but dewalt is my brand of choice. 

Second, if they don't know what they are doing they can punch holes in your duct feeds, which are nothing but coiled wire wrapped in plastic wrapped with fiberglass insulation.