ReStore by Habitat for Humanity and other charity shops, salvage shops, and Craigslist.

Successful people are capable of running businesses and writing books, mastering languages, mentoring others, volunteering for charities, and many other tasks not directly associated with their business.

If she wants to donate to a charity, donate to a charity.

You can more or less see this for yourself by google searching "[credit union name] IRS form 990," to confirm that these are neither lowly gov't bearcats, nor are they starving do-gooder charity worker volunteers acting purely out of the kindness of their hearts.

Or at the point in which your "passive" income (nothing in RE is truly passive) is well beyond what you want/need to be comfortable, give to charity, leave to your kids, travel the world, etc, then you can simply start consolidating, trading growth for debt reduction. 

Headsmack.....The OP is trying to conduct a business here, not start a charity.

Tenants staying put for 16 years typically falls on the side of charity. 

I guess I just wanted to feel philanthropic I suppose - but perhaps a waste of time… Nice of you I guess, but it's not wise to mix business and charity.

Nowadays if my heart feels charitable I donate to charity or volunteer my time to a cause instead. 

How many times have we all seen the same excuse -- "I'm not running a charity" as code for behaving cruelly?