I placed an armor stand in my house/base to see if it would place, because it wouldn't place where I wanted it to but that's most likely due to slabs, since I made my base in a sunken ship. I then placed it on the ground to see if it worked, and it did. The problem is it wouldn't be destroyed or broken. Its now just in a hole in my base due to me even trying to use a torch to break it, since gravel and sand gets broken by torches. My theory is that I cant break it due to the fact that the player cant attack quickly enough, since its only possible to attack in the combat test once its charged up. Boats can be broken with one swing from a sword, so that makes boats able to be broken, but I guess armor stands just take repeated quick attacks.