I would advise you to consult a lawyer for legal advice.

Sure, the Realtors could have/should have done more research to determine the current state of the title and to review the closing documents (some of that burden is on you, as well), however ultimately I think its the lawyer at the title company who had the responsibility to catch this.

For the disclosures and tax returns, can the lawyer that would be helping me with putting the property under contract help me out with this?

100% agree that getting to know people in the industry who are brokers, lawyers, lenders, even other newer syndicators who are around 1-100m aum to get a sense of how they are dealing with the process of getting their business started. 

Or even better, a good lawyer who specializes in parks that can write one up and guide me through what I need to be aware of?

You can probably stipulate the method of payment, but I'm not a lawyer :D If you're changing it after the fact, it may be a bit harsh to go to ACH.

Correct me if I am wrong, but I am assuming that a family's friends immigrated from another country and they are all staying together now given what is happening throughout US, which if that is the case I will look into public records to see where the owner is receiving mail.

(I have a great lawyer who listens to Bigger Pockets, if you need one.)  

We are requesting transparency in context behind these actions but wanted to prepare with a lawyer.  

Luckily, I had my lawyer review the purchase agreement first.