An independent third party electrical inspection of the breaker panel isn't that costly.

Ground Fault Circuit Interrupter.

Even the best general-purpose guys I know tend to shy away from doing diagnostic work... there's a whole host of tools that are used for things like finding open circuits, they aren't cheap, and they are worth having.

Estate sale with no outstanding taxes or assessments that I can find.Exterior: Brick in above average conditionRoof needs tear off and reshingleNew gutters/downspoutsFront steps (limestone block) need redo9 windows need replacement-average size is 28x42Garage needs new doorsInterior:Needs new kitchen-everythingBathroom needs updatingRefinish hardwood floors-in good shape overallNew interior doorsNew paint throughoutUpdate interior hardware, fixtures, etcBasement:Damp-due to poor/nonexistent gutters/downspoutsClean/paintInstall washer/dryer hookupsMechanicals:New HVAC needed but duct work looks soundNew water heater neededReplumb, all galvanized-pretty straightforward plumbing jobElectric was upgraded to 100 amp breaker service approx. 20 years ago.

What will be a deal breaker is if someone says "I'm new to this and just quit my job!"

Such as: freezing pipes in the winter, overheating in the summer, tenant actions that endanger your property (such as cooking with BBQs indoors, using candles for light, use of extension cords from one dwelling to another and overloading of electrical circuits), humidity build up, garbage overflow and vermin that follow that, etc.

Biggest annoyance with window units is balancing the size of the unit, placement, and number of available circuits.

I don't care much for the "get rich quick with notes" circuit.  

Someone sent me a published doc United States Court of Appeals Tenth Circuit from 1997.  

  $5K out of pocket in the first few years, with no end in sight, IS a deal breaker for many props.