How about 500+ loads for one girl, do it like this:
1. Each guy have there own plastic cup marked with his id in a freezer in your studio.
2. The guys come to your studio, identify himself, and get his cup.
3. You have a camera rigged, over a cup holder where the guy place his cup and jerk off.
4. He drops his load in the cup and then it goes back into the freezer (50 guys repeat this 10 times).
5. When time for Bukkake/Gokkun shot with the girl, the guys that have an OK health certificate get there personal sperm cup from the freezer.
6. All the cum from the checked guys is placed into a big bowl.
7. Place the girl in a "Pastil Chair", so no cum is wasted when spunked on by the guys (cum is collected between her legs).
8. After the Bukkake/Gokkun boys dropped there load on the girl, she takes the bowl and pour it all over her face and rubs her pussy with the cum or she drinks it all up from between her legs with a straw.
Pastil Chair
http://www.ambientedirect.com/en/pastil-chair.html
Bowl Chair
http://www.alibaba.com/product-gs/214406544/Bowl_Chair/showimage.html
Ball Chair
http://www.alibaba.com/product-gs/52382890/Ball_Chair.html
Pastil Chair
http://www.alibaba.com/product-gs/222046601/pastil_chair_fibre_glass_chair.html
/Hans from Sweden