I think there might have been some recent relief for the banking network but it could still be an issue for life insurance companies and CMBS on the larger deals.  

Though the house was built in 1940, it had great bones and mostly needed design updates to bring it back to life.

Obviously this puts the responsibility back on the current owner of the property and will make your life much, much easier in the long run. 

Hospital liens are common at end of life.

It reminds me so much of the Eastern Block under the Soviet Union where you couldn't control your own private property and everyone operated in fear, knowing their neighbors could report the slightest violation and destroy their life.

OR like Jim says do nothing and listen to nobody your Dad set you up for life feel blessed  

ability to own for life and bring our family and friends here for years to come.

I buy cheap houses for less than 20k on average, so I told him for every 10 houses he does for me I’ll change his life and give him one as long as he continues charging me very little to rehab the houses (3-4k for complete rehabs).

(I’d look into the illegal inlaw legalization first, because you may be able to grandfather in some existing conditions, making life easier.) 

My concern is triggering a "Due-On-Sell" clause and that the life of the loan will be under our personal names and not the LLC.