For example old cell phone bills are frequently illegally re-reported and legally the statute of limitations on them is 2 years.

This is an admission that one is acting as an agent, and is either acting as an unlicensed agent, unlawful in all states, or if he is licensed as a real estate agent/salesperson/broker, then probably acting in violation of the state real estate licensee statutes. 

There is an entire set of statutes in every state giving tenants far greater rights than a "customer."

Also, if you are going to be a landlord, download your state statutes and know them. 

Statute of limitations for a tenant to sue the owner can be brought years later, depending on state laws.

While statutes requiring this registration are rarely enforced, recording the contract will help prove the buyer's possession of the property and protect him or her from post-contract encumbrances placed on the property by the seller.different."

That is because the investor's statute of limitations will have expired to gain possession. 

Look up 475.42 and 475.43 Fl statutes. 

For how I understand the statute in FL deposit monies must be kept in a separate account for each received and landlords are not to commingle these funds with any of their other funds (sect83.49).

NM LLCs do not have great asset protection statutes, but they are very cheap and anonymous and as trustee, you don't get really any liability per se anyway.