Is it possible?

I hope to retive from the clinical arena in 5 years. I'll have a small pension but no benifits. I would like to go into teaching-especialy with 25yrs of critical care under my belt but I only have a BSN and that was a lot of years ago. I have heard that some schools are now using non-master/PhD degreed staff for clinical instructors- that wasn't the case when I went. Is this true? How common is it? Wages aren't that much of an issue- I just need health insurance.