You need at least one base station for the flight sim. But I recommend two. You can buy the older models online. They are completely sufficient for MSFS.

I wouldn't recommend buying VR goggles just for the flight sim. These glasses are also not the most comfortable for longer flights in the sim.

Thank you very much for your message.
I don't think I would use it just for flight sim. Subnautica, and a lot of other games interest me too, but things like Beatsaber and VR chat don't itch me that much, so I wasn't sure if you needed the sensors. I would still play with a Thrustmaster for the flight sim and with the mouse and keyboard for other games. so what kind of VR glasses should I buy apart from the meta Vr glasses.