While I understand that Gabby spent the night deciding what to do, she wants to do it "right now." And Will’s going along with it? Wouldn’t that be something you’d want to spend a couple of days thinking over instead of making such a rash decision?
And I find it kind of hard to believe that’s all the money either one of them had. Don’t they have any kind of bank account or savings? I don’t think any kid in their economic (or probably lower, even) position wouldn’t have at least some money put away somewhere. So they both carry around every cent they have in their wallets?
Then Sonny takes everything he has out of his till. How can you operate a business with no money in your cash register. Doesn’t he have a checking account?