Is this legal and a good idea? 

Most are fine with that, but a few will have problems with it and claim there are legal issues, etc..

I am thinking about taking the legal actions.

Land Trust" for more information.The trust keeps you anonymous, and the LLC provides a legal barrier in the event the anonymity of the trust is breached and there's action taken against its trustee.

For complaints to be valid, the complaint shall be in writing and identify the name and contact information for the person submitting the complaint, identify the name of the Member who the complaint is against, and contain sufficient amount of detail to determine the nature of the complaint so that an investigation can be conducted.

Consulting with legal and financial professionals will help protect both your interests and create a solid foundation for the partnership.

Unless your LLC has ownership interest in your property or has a member with a brokers license its legally vulnerable.

This was after I had them swap out a tank from the extras we leave there.the complaint was it was lit then went out.

Are there any other charges or legalities I should know of?

You don’t know if they are legal in that state or even protect you as the lender.