So even elements that don’t appear damaged can be contaminated.

That includes water, sewer and in one case heat. 

To many bad elements.  

The roof and A/C are covered also especially in the 100+ degree heat only a matter of time before they need replacing also. 

It keeps you cool in the heat, or warm when it's cold, it's very durable, it'll even out the tire pressures in your car and get you 15% more back on your taxes.

If your only interaction with your guests are asking them why it wasn't a 5-star then it could be the missing element is merely your personal touch during their stay with either a text or email checking in on them. 

Across the property, a guesthouse adds chic elements such as a custom fireplace, marble bar, billiards room and sleeping loft.

The rehab included all the HVAC systems (going from a leaky oil furnace to a heat pump and new ducts), insulation, LVP in most of the house, and fairly extensive work in one bathroom.

Keeping the roof patched, heat on, yard watered and mowed, etc. 

I can say with certainty that the market is over heated and as soon as the fed stops printing money, it will deflate like a balloon.