In addition to their financial struggles, all of the hospitals shared three things in common. They all served low-income communities that suffered from a lack of access to healthcare. They were all owned at various points by for-profit investors, including leading private-equity firms like Cerberus, Leonard Green, and Apollo. And in a move that stripped the hospitals of one of their prime assets, the owners had sold the land beneath the facilities to a little-known real-estate investor called Medical Properties Trust. MPT, which has purchased some $16 billion of hospital real estate over the past two decades, now bills itself as one of the world’s largest owners of hospital beds.