This locale becomes available as a settlement after switching on Nuka-World's power, whether that be from completing Power Play or Open Season and completing the miscellaneous objective. The settlement has plenty of flat space and a huge area to build in, much larger than the Red Rocket truck stop in the Commonwealth.
There is plenty of wood, steel and rubber lying around that can be scrapped to kickstart a settlement, albeit a small one. A supply line will likely need to be established to expand the settlement beyond a couple simple shacks. Furthermore, the entire area surrounding the building is suitable for agriculture and welling for water.
The Red Rocket has a similar design and architecture to other stations: the main office connects to the garage, and the fueling station is on the opposite end. Of note are the power armor station and armor workbench in the garage, and the Master-locked safe behind the desk in the office.