I am purchasing a property with two houses and a charity operates a food pantry on the property.

@Joy JamesCore values in any business are to make profit for you and your share holders , if you are running a charity then that’s different .

Donate to a charity they like.

If this becomes to be a pattern, however, you have no choice but to ask them to move since you're running a business and not a charity. 

You need to sit down and decide whether you are operating a charity or a business.

The developer is a charity that I support, however, I still want to establish a fair price.

You need to decide if you are operating a business or a charity.

I have a charity golf tourny on the 17th.  

Gotta decide, are you a business or a charity.

Since that time, I have made significant changes in my life including obtaining a bachelors degree, starting a charity organization, getting married, having a child, successfully completing three internships, and starting my own property management company in another state.