Purchasing the LLC gives you ownership of the property, but it also opens you up to additional legal exposure since the entity has been active, and there is no way to really know for sure what else they used the LLC for.

I've seen other people in the forum who simply use independent savings accounts but it is not clear to me if that is legal.

If you need financial help, ask under the "Finance, Tax, and Legal" forum.

A buyer agreement is the legal document that provides the agent with the assurance that he/she will get paid if they work with you to complete a real estate transaction. 

You will want to consult with a lawyer.In regards to your last two questions here's some background on what makes a contract valid and enforceable:Offer: A promise to do or not do something within a certain time period Acceptance: A clear and direct statement that all terms and responsibilities are accepted Consideration: A legal and adequate inducement given in exchange for the promise Capacity: The parties to the contract must have the legal capacity and competency to contract Awareness: A party must be aware of the contract Legality: The contract must be legal in the jurisdiction it will be operating in***Not legal advice*** Steps I would take: -Review contract in detail to understand each counterparties responsibilities (if you are not aware)- Email a copy of the lease to each of the tenants listed on the lease and reiterate lease expectations for termination notice, rent payment etc. - If the lease was signed via Docusign (other esign may have same ability) - you can go to the envelope, go to history and view the IP addresses for each action taken.

In Illinois, when an agent does that, there are functions normally expected of the realtor that they are legally prohibited from doing.

If you know of any legal entity in TX that can help in a case where GP is not doing their job (maybe a branch of SEC), please let me know.TIA

Do not rely on it for legal advice.

I don't want to wait to fix this, because the urine could seep into the subfloor and legally speaking I need to mitigate my damages.

Start by talking to a cross-border CPA and attorney to handle taxes and legal structures properly.