So, uh, who do I turn over the deed to my house and title for my car to?
How am I getting to work on Monday? And where am I going to sleep?
All of those are things that you personally use, i.e. personal property. Contrast that for example to a house that someone doesn’t use and extracts rent from.
Capitalists made a good job in confusing these two concepts in every day use, similar to how they like to confuse capitalism with market-economy, or try to appropriate terms like libertarianism, which originally meant freedom from economic coercion, not freedom to economic coercion. It’s a cheap trick to make gullible people support capitalist interests.
Gotcha.
So if I converted my standalone garage into a MiL suite, would I have to turn it over?
No, you don’t have to turn over anything, why do you keep coming up with that strawman?
But if someone else would come and ask if they can use it since evidently you don’t, there is not much you could do about it other that asking them to voluntarily reimburse you for your costs ; and not a rent that over time pays your costs back many times over. The reason why the latter is possible in our society, is because the state (via the police) will violently evict people from houses they use but aren’t their private property. Hence for private property to exist there needs to be violent enforcement and only the state makes it legal to do so.