How to wash dye out of 10 shirts at once?

Hi all, has anyone here tried tie dying several (10-ish or more) shirts at once? If so, how did you wash the dye out at the end?

I usually just dye one or two shirts at a time, so it isn't hard to rinse and hand wash them; that would be a lot with 10+ shirts. Is there a good way to do a bulk rinse (in a washing machine or elsewhere)? Once I've rinsed them, is it okay to put them all in a washing machine together (and what advice would you have)?