Alabama squatters related to buyer

[Veronica Correa]

My dad wants to buy my maternal grandmother’s house in Alabama. She passed and the relatives (related to me and not him) who live there are cannot or will not pay the remainder. He plans to buy it outright and put my name on it. My aunt, uncle and cousin currently live in the house. He anticipates them to continue living there. 

My concern is squatters rights as neither myself or my dad reside in Alabama. It gets complicated when it is family but I don’t know what those complications are and how best to proceed. Can we do a landlord tenant agreement? Do we eject and then rent to them? My father is not going to want to be extreme with it. Due to his age, I want to help but not to his detriment.

Please advise!