There is a small likelihood that:
* Zeus is going to lose all his money, either by himself or through his partner. They weren't careful with money in the past, have they? Why would anyone expect Zeus to suddenly become careful? At this age. If anything, the 200k is a big lottery win. He's going to end up coming back for more, and then eventually living with your dad to "take care of him". And then it's going to be Hermes and you to take care of all of this.
* Your dad is going to be coming to you and Hermes for financial support and probably help with Zeus's harassment in a decade or two.
* Your dad is not going to understand all this, sadly.