You can do an air pressure test for plumbing, don't know about gas.  

New paint and carpet, updated cabinets in one unit, large parking areaProperty Details Property Type: Multi-Family Home Seller Type: By Agent School District: Bedrooms: 3 Bathrooms: 1 Year Built: 1956 Square Feet: 1870 Acreage: 0.25 Acres Heating: Forced Air Cooling: Evaporative Cooler Garage/Parking: Driveway Yard: Landscape - Front Appliances Included: Refrigerator, Range Basement Type: Shelf/Crawl Space Floor Coverings: Linoleum, Laminate, Carpet Exterior Material: Other Special Features: None Specified

Dog feces indoors, carpet stains, stove looked like it was 50 years of neglect(was brand new). 

We rent houses out there from $600-$800 that are completely rehabbed and have full central air, garbage disposals, etc.

Has had forced air heat, new electric, and water heater all installed by previous owner.  

It's generally a terrible way to heat, as it's almost always the most expensive option on the utility bill(versus gas forced air or gas hot water, for example.)

The forced air furnace were installed I just never realized there were no condensers on the property, which would have been the first sign it wasn't included.

. #2: SFR 3 bed 1 bath with basement, central air with a long term tenant in place paying $600 per month.

You may consider Air BNB but I understand that requires furniture etc.

@Leo Popescu I think everybody was blowing hot air, and doubt that many people are actually going to do that, even the celebrities that said they were are now backpedaling and saying they aren't moving except one or two, everybody is blowing this way out of proportion and nobody really knows what is going to happen.