I can only testify to Mid-West markets, having invested here all my career. 

The judge in my case found unit 3 guilty based on evidence and tenants who showed up to testify.

And keep track of where the tenant moves so you can have them testify in court. 

You can watch video of Alan Greenspan when he was testifying back in the day.

You know what the family testifies....he knew the house was worth $400K, he sold it for $400K, he never told grandma this, she doesn't remember, she says she signed under duress or felt pressured or because you called her 20 times like many wholesalers do. 

Again not an attorney but have dealt with a lot of these issues in the past working for a developer and having had to testify in the past on what was built vs what was represented.

I believe you can take them to court if you can prove that the seller knew that it was an ongoing issue and did nothing to get it permanently fixed (hence you would have your neighbor as a witness to testify).

The previous owner has also agreed that he had promised them that they could stay until that date.Ive since had a response from the previous owners lawyer:“The tenant is occupying the property pursuant to a verbal lease agreement with the prior owner extending the term of the lease until March 31, 2022 as set forth in both estoppel letters.If the prior owner is called to testify in eviction proceedings, the prior owner will have to testify as to the agreement with the tenants as stated above.”Ideally I would like the tenants to vacate asap so we can renovate and increase the rents.

Here, as licensed Real Estate professionals, we are required to use an attorney for evictions, however as PM I do testify.

Recently a former title insurance employer asked me to testify at a trial for a suit brought by an insured whose claim I had had denied.