Is experience teaching college statistics sufficient to apply for a non-research stats professor jobs?
As long as you are still at the assistant professor level, I think your application should be competitive at many schools, provided you have evidence of good teaching.  Many mathematicians have gone over to statistics, and at a school that is primarily teaching oriented, what they typically look for is someone who teach well, provide good service and be a good colleague.  They probably won't care much about your actual area of research, just that you can cover well the courses they have in mind for that position.  If you've taught several similar courses, and have good letters about them, then this is sufficient evidence of teaching capability to me.

In fact, your position would be viewed as advantageous by many, as you should have more experience in both teaching---in fact, possibly more experience teaching statistics---and service than a fresh statistics PhD.  Also, presumably you've shown that you can sustain your research on your own.