Cant seem to figure out how to set it so the hotair bloon i spawned will not fly as high.
controller.serviceCeiling = 200f; 

Anyone have any ideas?

error CS0176: Static member `HotAirBalloon.serviceCeiling' cannot be accessed with an instance reference, qualify it with a type name instead

serviceCeiling is static (or global), meaning it exists in the class scope not in the object scope.

It must be accessed directly..

HotAirBalloon.serviceCeiling​

so this will change all hotairballoon to the height?

most likely