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
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!!!