@Sylvia B.As others have noted there are moral, ethical and building code issues.

Cockroach infestation is considered a life and safety issue since they spread disease.Your PM had an ethical and moral duty to rectify the situation immediately.

Its a business and of course we want the best return of investment possible... but we have also (for most of us however) a duty to comply with the laws, be human, and also be ethical. 

Living Will; End of Life- This is more for applying medical treatment or not under certain circumstances to continue your life support, while you are incapacitated.

I wholesale my deals (ethically, by the book(is there a book?)) 

Also I recently found out some states don't participate (California is one) on the tax treatment of Opportunity zones.

Slight blood spots on the pillowcases were the worst thing and they came right out with some pre-treatment (Shout).

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Sad part is many of us have been down this road.In business there is no such thing as business ethics, there is just ethics. 

But I say if you do it transparently and ethically, then rule the gray area...