In laymen's terms: oil goes up, oil goes down, of course we are affected— we know how to contend with that.

However, there are other facts to contend with. 

If you think this won't effect real estate, i contend you are mistaken.

Who is the better contender in finding quality agents.

Suffice it to say that any gas utilization equipment found to produce elevated/unsafe levels of carbon monoxide in flue gas is normally considered sufficient grounds by the gas company to shut-off gas to the property in addition to 'red' tagging gas utilization equipment responsible until such time the condition is addressed and no longer considered a threat to the life and safety of the building occupants.CO Poisoning Goes Virtually Undetected in a Professional Office EnvironmentIt's a cold, sunny Saturday afternoon in February and I've been given a reprieve in the weather thereby allowing me to use an outdoor scissor lift to safely access/observe a flat roof 24-foot above the finish grade (pertaining to the property for which I have been hired to conduct a PCA) without having to contend with rain/snow and below freezing outdoor air temperatures preventing a visual inspection of the roof much less conduct a higher level due diligent assessment of package rooftop units since gloves cannot be worn as they tend to interfere in attempting to access hidden system components such as air filter elements, blower fan motor assemblies, serpentine tube heat exchangers, etc. typically concealed from view in conducting a baseline PCA.

Any environmental issues must be contended with, zoning or land use violations will come to light when a property goes under contract and may kill any sales or drastically reduce the property’s market value.

Also consider now that filing for evictions has been suspended until recently here in DC, meaning you’ve now got an additional backlog to contend with. 

Others are able to pay but say they won’t, to help bring more attention to the cause.The Queens strike is part of a nationwide effort to get tenants to stop paying rent on May 1 as they contend with widespread joblessness and economic hardship.

If you have an obvious duplex on the front, the ADU would not be permitted in any case.  2 units max.The height max on the ADU should be 24', but you do have bulk plane to contend with - and to your point, NO upper story decks are allowed on an ADU anywhere (back yard privacy thing). 

I contend that it is both and that all real estate investing should be treated as a business.