It is different everywhere. Some nurses I knew, did this in addition to the hours they put in on the unit as floor nurses. Others, left floor nursing entirely and went on to do this fulltime. One surgical tech I know, not only left her job as a CST, but established a very busy and thriving business, teaching CB and BF classes for our hospital and two others.
Do you have your CB education certification? This would be most helpful. I know I have talked to you before, but I forget your experience and/or credentialing. Hope this helps.
PS I want to teach classes one day, but around here, this gal has "it sewn up" and pretty much shut down the competition. I might just ask her if I can do some hours for her, and get my experience that way and then we can see what happens down the road. I just know, as my body gets older, floor nursing won't get easier. Patients are getting heavier and the paperwork is, too.
I took the childbirth educator course that our hospital uses for its instructors right before I decided to go to nursing school (so I never ended up teaching it). We seem to always be needing instructors (particularly for the outlying hospitals that no one wants to travel to).
Being a new nurse now, I've got way too much on my plate right now to do it. I don't think any of our nurses do it, the instructors are all employed elsewhere but related to public health/infants/etc. (one works for Healthy Start for instance).
If we did, it would be beyond our regular nurse hours and duties.