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My post was for the manager, not the musicians. He, apparently, is looking for ways to manage input to multiple tablets using what is available in MSP. Once he has the stuff loaded, then the musicians should, at least, know how to turn the tablet on and get to their instrument page. After all, they learn how to turn their instrument on, tune, adjust amps, use mics, etc. when needed. 
I'm pretty sure he's not really that concerned with the nuts/bolts of app design/programming, I know I'm not.