Then I donate the toilet to the local Habitat for Humanity Restore for a tax credit.  

You might also qualify for the de minimis one that you mention since it is line item amounts 2,500 or less.I don't see this as strict adaptation, and nor would it be betterment or restoration.

I think @Jeff S. nailed it.If you were determined to buy this I'd give some thought to a small office cluster for therapists/ practioners like counselors, massage therapists etc.

However, lately, I've been researching co-living and short-term rentals, and I believe the property would be more attractive with a restored pool.

There are ways to conduct a one-time restoration of benefits, or to restore benefits, but those require you to refinance the existing mortgage into a conventional loan, or no longer own the home, so they probably aren't worth it with your current scenario. 

For the sake of the product that you all want to massage baby oil all over and take to the beach on a nice summer's day, sipping a Mai Tai, and of course, crushing real estate on an app, just let this thread rest in peace.

They have redemption rights, which would restore title to the owner and the liens would re-attach.2. 

Then you get down the rabbit hole of integrating platforms and automating your workflows which takes a lot of massaging and some technical skill. 

:nono: However, fixing something just to restore it to it's former state sounds ok.

And dun the security deposit for the amount that it cost to restore it.