I was looking at another house and saw a new build where only charity would build.

The property upon dissolution of the intended use has to go to charity.

The point is keep business and charity separate, especially when family is involved. 

Give back to the world through charity or philanthropy? 

Unless you are in the charity business (and I'm betting you're not) what is the point in keeping a tenant that doesn't pay?

"If someone owes you go after it, you're not a charity so don't give money away except to those you want to."

I actually wrote about this in my very first BiggerPockets article in 2017: How My Journey Out of $2.5M in Debt Inspired Me to Live a Charity-Focused Life.

(Duplexes are 400k-600k)Furthermore, the laws where I live treat landlords as if they're charity workers; it is very tenant sided.

That way friends, family, local non profits and charities won't hit you up to "donate" a week, weekend or getaway. 

Meaning, do you expect to sell in 3-5 years, some longer time frame, or hold as part of your legacy to pass onto children, grandchildren, charity etc...All of these things are important considerations to think about before you deploy your resources.