Stop buying houses in your name. This Land Trust Document Pack has all the documents you will need to Start putting your properties in the name of a trust. More on this topic here: https://www.youtube.com/watch?v=EQs67Lkrb6Y
Attorney Jessica Segal dicusses the importance of properly setting up your LLC here: https://www.youtube.com/watch?v=QNqaol3BGvw&t=2031s
Before you invest 1oz of time, money or energy in a new partnership you MUST put in writing exact specifics and to what each party in responsible for in the partnership. Don't even set up the LLC before you do this!!!
Paperwork makes the paper work! Don't go and run online and get generic lease! There are very specific terms and sections that protect you as the owner.
Check out this great video