Currently, when you press the upkeep button on your property, it does it immediately, with cash from your vault, without any confirmation screen or slider to choose how much you would like to pay out of the total.

I think it would be a great improvement to add a confirmation screen for when you pay upkeep, and possibly a way to choose how much you would like to pay (or from where you would like the money to be taken)

Further comments are welcome!