Yes, you could theoretically sue them for the costs, but actually extracting the money from them is easier said than done.If you must talk to the tenant directly, keep it professional.

It has a cash flow of 500 dollars if i extract all the expenses and With a vacancy of 5% BUT i can see there is a lot of other renatal units that is posted on Our MLS in Our small town.

The intention would be to perform any necessary rehab once the title has been cleared to get it rent-ready and then refinance the home to extract the investment along with some of the equity.  

Sounds like you're trying to extract max equity? 

And the banker told me if I join Chase private client, they can do a cash-out refin on my current house and extract $290K out of it, so I can pay the investment house all cash, and they can do 3.75 for a 10/1 ARM loan.Should I do it?

I have been involved in residential mold extraction for nothing other than pure lack of HVAC use.

They'll want a copy of the plat for your lot as well as the footprint dimensions of the house to be moved (the former, presumably you already have a copy of, the latter may need to be physically measured or extracted from the plat of record for it).The physical move of the existing structure is just one scope of work among many.  

You can use cash-out refinances to extract more equity forever.

Ideally, I achieve infinite ROI via the BRRRR but I do not achieve a full extract of my investment unless I get a significant assist via appreciation (so I fail on the infinite short term ROI). 

Goal is to extract equity from this project ASAP for another.