The Hyland Manor is a new location to expand your business in Schedule 1, but you can't just outright acquire the place.
Unlike other places of business, you'll first have to complete a quest to acquire it. This refers to the Benzies storyline, which also marks the introduction of the cartel system in the game. The cartel, quite obviously, lives in the Hyland Manor, which is an offbeat place. In fact, finding it can be a difficult task on its own, but you're given its location as part of the storyline.
