Well it isn't necessary really, since you can write "cash" in your console. It should give 5000 gold each time and since it's a console you can easily repeat the command with the up button.
Well it's easy. Press "~", write down cash, press the "Up Key" the command should reappear in the console. Also I don't think you can.
You can however mod some events to make them give you a specific amount of wealth, they're very easy to manipulate.