Dear Ed,

I think your main concern should that the teacher in question may not be properly qualified as he is, himself, still a student.

As a fully qualified guitar teacher also, I would be more than happy to teach you wife the bare essentials of playing technique. For a trial period, I would also be willing to provide these services on a "pro bono" basis. It is not always the case that you would expect to hear music during such lessons as the initial training is based on correct finger placement and holding of the instrument.

Yours sincerely,

Dr. Guitar