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

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

This is a business, not a charity.

As for the amount of rent increases - everyone loves to pound on  the "this isnt a charity"  thing, no, but it is a weighing of options.... 

Don't give up, but don't expect other people to treat their business like a charity......this guy may be on the verge of financial ruin himself because you have screwed him over.

You didn't start this to be a charity.

It can be as simple as putting it on the curb or dropping it off at a charity. 

It’s a charity thing.

People need to treat self managing like a business, not a charity.

The more you coddle this tenant, the easier it will be for her to take advantage of you.If you want to be generous with your time and money, I suggest you find a charity that appeals to you and donate there.