There are homeless people in real life, and people who own multiple homes as well.
Now that there's restrictions in place there's nothing anyone can do, the fundamental laws of our universe has been altered. But before such, people owning multiple houses that they actually use wasn't a situation raised in ethics at all, in my opinion. It was not ethically sound and it wasn't unethical of them. It was pretty neutral. It was simply people playing a video game.