Oh my, that is fantastic. It's so dreadful, it's wonderful.
(For the first part of the question, a going away party is a lovely idea. I don't see that anyone needs to have a proper event in order to host a party, so I don't see why it would be odd at all. Everything else is just ridiculous though)
One thought. Is it in anyway possible that the whole thing is a joke? I remember writing a letter of instruction to my mom about my wedding along the same lines "ie: The best best way of showing love is with large cash gifts and bills smaller than 50's make Baby Jesus cry" kinda letter.
The whole thing just sounds so crazy.