Statistically, people overwhelmingly are not murderers.

Even people with motive.

But such a thing would attract them. Like rich people attract kidnappers.

Is there a faster way of becoming prime suspect? The kidnapping equivalent would be allowing random people to take out 'kidnap insurance' on you (with your agreement). If it so happens that you are kidnapped, it's pretty obvious which door the investigators will knock first.

Generally people who kidnap believe they can get away with it by never being in the frame as it were. Given that you'd be one of the prime suspects on motive alone in this case, it seems like a bet on being able to commit a "perfect" murder.

I don't think it's a likely occurrence

But this attracts the few who are.

Actually it wouldn't be. You are buying an asset for 50% off which will continue to go up in price. And you get to pay a rentor a cheap rent to take care of your asset their entire lives.

It's a great deal if you can get it. The only time this will get problematic is if housing prices drop and continue to drop.