The tenant obviously had mental issues and 56 years of age so its very stressful on them understandably.

You don't want the tenant claiming some kind of mystery ailment from the old oil you allowed the old tenant to leave there, which would also be negligence. :)

Buy and Hold is a very different mentality from Buy Low and Sell High. 

https://store.nolo.com/products/every-landlords-tax-deduction-guide-dell.htmlIf you're looking for mental health, how about Buddhist monk (grew up in the UK with a white British accent) Ajahn Brahm. 

The tenant may have a legitimate mental problem that is triggering their behavior, and if they are that volatile you don't want to do anything that causes them to go off the deep end. 

They are -- statute of limitations, -- bankruptcy, -- death, and it's too late to file a claim against his probate estate, -- Seller mental incapacity (and this one is a maybe).Then there are the business reasons not to sue.

That way when i do see a deal I am mentally prepared to do it.

It can be "prescribed" by almost anyone, including a mental health counselor, physician, psychiatrist, or even a church pastor.There's a lot to navigate, a lot of unanswered questions, and HUD doesn't do much to help the Landlord.

But this "evict them all mentality" is not my cup of tea.

People unfortunately take the mentality why is the owner being unreasonable until it happens to them.