Doesn't matter how "real" the geetar might feel, GH is still FUCK ALL like playing a real musical instrument.

Have an option to add strings and play like a would-be* grown-up! If those are real machine-heads, shouldn't be rocket science. The buttons might get in the way though.

Son: Dad, when I grow up I want to be a musician

Dad: Sorry son, you can't have it both ways

So why is it the price of a reasonable entry level instrument?

I wonder if you could design something to clip on a real (cheap) electric guitar? Most music stores do a cheap "decide if you like electric guitar" pack for about a hundred quid with a guitar and amp - bundle the two and you'd get Guitar Hero controller which becomes a real guitar after Xmas.