Bank Simulation App

I am looking for a Bubble app that will simulate me owning a bank and having people sign up on it in order to have checking, savings and other accounts including credit cards on this app. I can set what I want interest to be. The required amount to keep on hand ETC. I wouldn’t mind doing an economic cad other than the fact it’s just simplistic and almost to easy to use. I am willing to pay money for this. If anyone could help me find one that would be great! My budget would probably be somewhere in the $10-$20 range, Thank you.

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