The promised photo docu-drama from beginning to end:
I made the base of the cake out of rice crispies (instead of styrofoam) and oh.my.goodness. It took 6 bags of marshmallows, 4 boxes of rice crispies, 1 1/2 lbs. of butter and 6 teaspoons of my precious Madagascar vanilla. I had no idea. Next time I'll probably just use the styrofoam, but at least the rice crispies were edible!