Do you have a dishwasher that will wash 1000 water dishes a week or the time to hand wash 1000? I don't and won't judge those that don't either. And where does all the soapy water go that's required to clean that many? How green is that?
I personally will be moving to the disposable deli cups soon myself, and I have a very modest collection.
I'm also not sure your point on live prey - I also feed live, always have. I haven't seen any risk in feeding live - over 3000 live prey fed off and not one injury - pretty low risk in my sampling.