I am an audio electronics technician (and musician) so I'm always calling my customers to discuss pricing and what repairs their amplifier or guitar needs.  

I guess I should.I'll mention my first actual real life local contact first...and we still work together...my good friend and fellow musician, @Jerry Puckett He's taught me the ins and outs of direct mail marketing, and given me some rather nerdy but effective ways of processing thoughts and defining some kind of plan, in all walks of life, not just RE.Oh yeah, and my first RE "job" on the side.

I'm a musician and teacher.

I'm a self taught musician.

But, I called the other tenants in the vicinity of the musician and it turned out he was driving them all batty.  

Consider turnover costs as a factor (all other factors being good enough)- I am self-employed and can attest that not all self-employed people are created equal (think about a musician vs. a lawyer or investor with his own LLC). if you are truly worried about Couple B's 2nd income, ask for a 2-3 years tax returns showing total income and carefully consider the circumstances and stability of the self-employment (10 years as a piano teacher vs. just starting out).- finally, do find yourself already annoyed with couple A?

We both have W-2 jobs and self-employment income from our respective professions (sign language interpreter and musician/pianist/entertainer.)

And, short.I don't rent to musicians.

Mailbox money is a term appropriated from us musicians.

I do 'creative houses', meaning that everyone has to be an artist/musician/creative of some kind.