There is zero volatility in the monetary policy of bitcoin.

Very simple to do.1) In the hole you, spray some suspend sc insecticide inside the hole. https://www.amazon.com/Suspend-Insecticide-USA-Supply-Eradic...2) Get a beekeeper suit, just in casehttps://www.amazon.com/Professional-Ventilated-Sheepskin-Bee...3) cut open the area.4) Spray inside the entire wall the suspend SC5) Dry out and close up the wall.If this cost you $200 and some time, I'd be amazed. 

I would pay off the remaining 416K by getting a mortgage and hopefully have about 100K in equity.Anyone have thoughts or holes in this idea?

You might see some stains or loose paint on a bedroom wall if that is the case.It looks like there is a spot fix needed in the pic with the 2 holes in the wall.

If you and the tenant can work things out amicably and determine a move out date + monetary amount for early lease termination I'd also speak with them about having permission to show the unit prior to their move out date. 

A hole in the wall behind the stove-they can tape it up short term if it is really a problem. 

If you just grab one off the Internet, it will have a lot of holes.

Just as the tenant won’t voluntarily move out before lease termination because I found a tenant willing to pay more, I won’t suffer a monetary loss because they can’t or won’t fulfill their contractural obligation.  

Start with Pace Morby and then go down a rabbit hole of videos for 20 hours and you should be able to understand most of it. 

In your new hole, supplant with a high quality mulch soil mix.