I can't help for the bank stuff but if you're looking for admins only command I think that adapting my MW3 chat commands script to BO2, adding the commands you want which is easy given the code structure and examples in place and given that you can copy paste the functions you want from menus and then simply add a check for the player name or GUID. The only downsise is that you would have to use a unique command prefix to avoid conflicts
https://github.com/Resxt/Plutonium-IW5-Scripts/blob/main/small_scripts/chat_commands.gsc
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