As far as I know, the android version of Touch OSC only supports the premade templates… that’s a deal breaker to me. Also, I would check how the touchscreen feels for the cheaper tablets. Beside these 2 points, I think it’s a pretty good idea.
With a simple call-out to a bunch of my FB friends, I was able to pick up 6 1g iphones for a TOTAL of $80. I removed the SIM cards, jailbroke them all, and now they’re great with touchOSC audience hand-outs.
You might be surprised how many people have these things collecting dust in a drawer somewhere.