Could be more if your Buyer asks you to cover some or all of their closing costs.Moving from house A to house B costs: 2-3%. 

But the current tax law allows you to use some or all of that loss to reduce taxable income from the rental itself and any extra can be applied to other sources in many situations, including other rentals that produce a net profit even after depreciation.Welcome to the 9th Wonder of the World: depreciation!

If she was on an oral agreement, or a month to month that specified payment on the 21st (which I find hard to believe), then give her a new lease, MTM, effective in 30 days. 

Take home message is that this is highly contagious, is contagious for several days before the patient is showing symptoms, that patients can be ill and NOT have fever for at least the first six days of illness, and that the blood test for coronavirus may very well not detect it, although apparently nasal and oral swabs do detect it. 

Also, I still have deposits that will cover some or all damages if the tenants do not take care of the property.

debt or all cash?

You might see if cable TV/internet is available.You might check if Natural Gas service is available by calling that utility unless you know Propane or all-electric is the norm in that area.These are the first steps in my area. 

If you fail to enforce that for this early termination, you should consider striking that clause out of your lease because anyone down the road you try to enforce it on can claim you are discriminating against them for reason X, Y, or Z (or all three!). 

I left a couple filters when lease started 18 months ago with oral statement to change filters regularly.

You could move a lot or all of that $800k into a self directed account and lend out through private lending in real estate at 8-10% and never ever touch the principal if you can live off the interest.