You might want to create a new topic for that.
I mean check the TycoonModel variable and add WaitForChild instead of FindFirstChild. This will probably be one of my final posts as this Topic is going disapropriately long. Please create a new topic; for other people this is already marked as solved.
alright so i am going to give you a brief explaination
Local Script work in StarterGui,Tools,StarterCharacterScripts,StarterPlayerScripts,StarterPack
Scripts work in ServerScriptService,Workspace,StarterGui,Tools,StarterCharacterScripts,StarterPlayerScripts,StarterPack
Module Scripts work in ReplicatedStorage (As far as i know)
Nil means a object that dosent exsist
Module scripts also work on other client and server objects, the way you code them is just slightly different.