I think John Marks has his dollars wrong. An ambitions audio system is around $10K, which is about what I have in mine. I know that many audiophiles spend more, after all, I've read about $60K amplifiers in Stereophile. But tell any non-audiophole even a couple K and they think your nuts. So if you were taking about a music teacher, what you really need todo is give them a system for $2K that will rock their world.
I know that's modest buget. But remember this, most teachers make far less than $40K a year and most at a private school make under $20K. Only very committed people spend that much of their disposable income (which is disproportately affected by income). So to expect a teacher who is barely in the middle class to drop close to $10K is silly.
The thing is I belive the $2K system a very relaistic goal. A small integrared amp (say a creek or NAD) some small Epos speakers, tha sony SACD/DVD player, maybe a used tuner could be done that really sounds wonderful. My father put together such a system for a muic teacher friend of hus.
We shouldn't assume people are like us. We need to meet them where they are.