HEY, I got some good info on

HEY, I got some good info on this, for a life stream you could instead of buying a fixed set of mixers, use PC mixing software, like Pro Presenter, or i think adobe has live stream program, theres probably more out there, but what you would need is simply a large adapter with mutliple inputs to the PC

OR

you could call around all the churches and community colleges and see if they have any old mixers they would be willing to sell