everithing on hand equals bad performance?

So making a FPS game, and i'm thinking about making it in a way that the player is going to have all the weapons/itens on his hands, but they'll have their mesh renderer disabled, and it will be enabled when they equip the iten/gun would it be bad for performance?

 

usually disabled game-objects should not cause performance issues if you don't activate/ deactivate tons at the same time. but i bet if you just tried it out you can find out what you want to know.