Nope, it won't show for every client that connects to you, because the client TF2 checks every economy item against the item server, and if the item doesn't exist in the player's backpack it won't be visible to everyone on the server. So if you give yourself a gold frying pan, it will be visible to you, but nobody else can see it since their TF2 blocks displaying the pan on their screen (since you don't legally own it in your backpack).
That's why it works well on MvM robots since they bypass that restriction.
You can possibly modify the mvm robots plugin so that it works on all players and attach a command to it.