The PM says this is potentially shaping up to be a lawsuit that my tenant is interested in.

Then there is fraud and you have a lawsuit target(s). 

Although there is the caveat that unrepresented persons in contracts leads to lawsuits at about a 10x factor versus when both parties are represented.

With the new info you provided, the land does come in about 60-70% for other similar propertiesDoesnt make sense why land is so high to meI would think this would be ripe for a class action lawsuit but thats just my uninformed guessing

And California also capped security deposit, thus literally robbing landlords by AB 468 that's faking human right issue.If there is class lawsuit, I want to be the first to jump on.But my question is, why landlords are so docile to this evil law? 

I also check to see if he's been involved in lawsuits either as a plaintiff or a defendant and if so what kind of suits were they and how did they turn out.

They admitted to charging the same for other turnovers, so if it is fraud, it seems like grounds for a Class Action lawsuit?

Further, there was a lawsuit brought by the City to attempt to shut down a STR operation that concluded in November of 2022. 

All you can do is wait the required number of years and then file a lawsuit to foreclose your lien.

@Hunter McNeill how else are you going to get liability coverage for a personal injury lawsuit from a tenant?