Is it efficient to use remote events for user input when making a simple airplane?

Hi, I want to make a spaceship, and I currently detect user input keys in a local script. From there, I fire a server event and then I have a server script in the ship that will run when it is called by the event.
However, I'm wondering if this is smart, since i feel like it will put a lot of burden on the server, slowing it down, especially when there are many players all triggering the server event.

Is there an alternative to this? Maybe just use global variables? Thanks! (I'm a complete noob at scripting).