What are some signs that an instructor is just in it for the money?

[jobo]

O2 arena, Wembley arena, random posh looking pub near O2...

That's what the prices displayed were - I'm far too tight to pay that though, I went to Tesco and bought some cans instead

Yea concert hall are notiuriously expensive,

 

[BigMotor]

I would check to see if he has students compete in matches against other schools; and there would need to be a declared winner and loser of the match.