I do not know the laws, but investing in a home AED in this situation is a wise decision. The cost is nothing compared to the loss of a life in your home on your watch. I would definitely buy one. And check into ADA and other possible state and federal tax credits for purchasing one. I know there are many such credits and incentives for such business purchases.
this depends on your state and their laws.
Here in MD we don’t have to have one at the trainers home but facilities up from a certain size need to have one.