It's always best in these situations to make sure you create a 'paper trail' of the communications between you and the tenant, as it may be admissible to the court, depending on the your state's specific statutes and court rules, which I am unfamiliar with.This answer is not a substitute for professional legal advice and does not create an attorney-client relationship, nor is it a solicitation to offer legal advice.

The fact that Seller admitted he knew the hot tub needed to be replaced is his admission of trying to deceive you.  

By your own admission the inspector only inspected half the units. 

But you can't call admissions and ask them to confirm that he is or was a patient there.

@Aref Shehadeh  You could charge an admission fee.

Do REIA organizers typically charge admission for group meetings? 

Some of the items/infractions described are attributable to wear and tear and would not be admissible in court.Additionally, there is no proof that the crack in the refrigerator drawer cover didn't exist before you or ex-tenant were made aware of it prior to the cleaner's discovery.So, the bottom line is that you are riding a slippery slope and may want to come to some amicable agreement with the ex-tenant before it escalates.

He manages the property himself and I think per his admission he just has not paid attention to them as he should have been.  

However, I think the landlord response to the broken mirror was unreasonable in the first place.By admission, the tenants were "good tenants" and as a show of appreciation, the landlord gets petty after the walk-through on a mirror they can not prove was broken by the tenant.So...just my two cents on this score...this is a problem created by the landlord that did not have to exist in the first place.

Right...the admission is $10 but it's always nice to be able to talk to an attorney and you will also be able to network with a variety of active investors doing different investment strategies so you you tackle two of your to do list items right there:)  Feel free to join the Brew City REI Club if you are on Facebook--you will learn a lot from the group.