I, like Kevin, and many others around here, believe that BPs (and snakes in general) should be kept in separate enclosures... as he stated there are many reasons: possible spread of disease, issues of one snake dominating the other and causing stress (as it sounded in the case of your Adrian and Adam), problems eating (due to the stress), etc.

I'm not sure how you're housing your snakes (maybe you could give us a run-down of how you set up your enclosures?)--but because you have so many, you might want to think about rack systems. They're space-efficient and would allow you to house your snakes individually while taking up MUCH less space than twenty tanks/loose tubs would.

Just some thoughts

Also--I think it's AWESOME that you bellydance professionally. I took a class at my University a year ago and I've been really wanting to take classes again. It's such a beautiful art form--and I feel good while I'm doing it