You could drop your rent to charitably accommodate this gentleman.

If the tenant has been a good client and you feel charitable (there is nothing wrong with a compassionate business as long as you are not being taken advantage of or starving yourself/family), then I'd arrange with the tenant to deliver the keys to you on XX date and you will either a) prorate their deposit back to them according to the days they had "key occupancy" assuming the condition of the residence meets your standards to release the security deposit, or b) charge them the amount of the anticipated date XX on the 1st of August and then return their security deposit upon their subsequent vacancy and cleaning subject to your inspection.Personally, I like the prorating of the security deposit better if you feel like the tenant is a good individual and will treat your property with integrity before they move, and it shows additional compassion by not tying up their money while they position themselves for a new location.In any case, do not put yourself in odds with the law, and do not perform any activity that would allow your tenant to come back against you. 

There is certainly some saber-rattling involved given the limited recourse available to such a person, even if you charitably assume that he could prove the nuisance sufficiently with adequate documentation.

Increase your charitable contributions.  

So, I suggest you just do your charitable donations privately - or at least not let your tenants know about it.This would possibly feel a bit demeaning to them. 

It has nothing to do with being charitable. 

On the other hand you could be the charitable landlord to give him a helping hand in life but then you would no longer be operating a business.

I am making a donation of my house to a charitable remainder trust.

@Pete CrutchfieldHello  --From the SBA WEBSITE = Charitable, religious, or other non-profit or eleemosynary institutions, government-owned corporations, consumer and marketing cooperatives, and churches and organizations promoting religious objectives are not eligible.

Where as, your time spent is not an income to anyone.It’s a same concept as you can’t take charitable deduction for the hours you volunteered.