Doesn't read like a novel, but he's a good teacher on a dry subject.

Find a JV partner with the heart of a teacher.

Sometimes, the student teaches the teacher.  

No one has EVER asked me about my GPA, about some book I read or supposed to have read, about fact a teacher told me in a lecture, etc.

If you have a lot of time off as a teacher, you may want to consider joining a syndication mentoring group.

If you provide more details on what might appeal best to you (eg one educator vs a team, in-person classes or online education, an "in your face/kick you in the ***" type teacher or more of a "here are your tools -- if you have any questions, let me know," maybe even if you want to start with 1sts vs 2nds, etc), I'm sure many of us can give you a little insight into which ones might be best for you.Just make sure you never invest with an educator as it's a conflict of interest.

Ringer's books and other active teachers like Mike Cantu.The best thing I got from school was an appreciate for valuable information, something that others don't seem to attach as much value or even act upon. 

I am also a firm believer that taking action and getting involved with a deal is the best teacher. 

The man has 20+ years at two water treatment companies, and the woman is a tenured teacher.

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?