In my experience your business will also do better when you look to freely share information and not exclude people.

And that's excluding opportunity costs, time, and travel.  

However hopefully your QI has told you that you will not get to exclude all of the gain when you do sell. 

I would assume that insurance would exclude volcano eruptions.

I allow dogs in all my apartments but of course not the breeds excluded by my insurance.

They find a total average return of 9% for the period they looked at (1986 to 2014), and conclude:"Each component contributes approximately equally to the aggregate U.S. portfolio of housing returns, so excluding one component excludes half of total returns on average," There is also a helpful graph comparing the breakdown between the two factors in the 30 largest metro areas. 

Consider a new Seattle law that bars landlords from screening prospective tenants for any criminal history.Passed Monday, the Fair Chance Housing ordinance prohibits landlords from excluding prospective tenants because of their criminal history, from requiring or conducting criminal background checks of those prospective tenants, or from charging them higher rents and security deposits."

When regular contributions are entirely distributed, conversion and retirement plan rollover assets(excluding designated Roth 401k rollover assets) are considered distributed next.

If it was a primary residence for at least 2 of the last 5 years then 250-500k of gain should be excluded. 

Enough landlords used blanket-type policies that would exclude someone with a silly retail-theft charge from 20 years ago, that the lawmakers are gaining traction in some areas in banning background checks all together (even for murderers).