I'm not sure if I'm being stupid here (probably

)but why do you need an organizer for this type of event... is this arrangement something you want and are comfortable with?
Just asking because it sounds like you do all the work and take all the risk whilst being paid below the level that you feel comfortable with. I agree with you that ?20/?30 will attract chavs and undesirables, ?50 sounds far more reasonable and would be what I would charge in your position.
The only benefit that I can see from having someone else arrange the bukkake for you is the security aspect; i.e. guys are unlikely to try any crap if there's a third party there. But you could arrange your own security

If you want to do bukkake and make money from it why not arrange it yourself, pocket all your well deserved earnings, and arrange yourself for a trusted person to film / supervise for safety reasons if you want that? xx
Just an idea (from someone who is loathe to give undeserving third parties anything) x