Just make sure this is what you want to do. I know (or at least this is how it used to be) that you could lose your certification if someone reported you for using aversive techniques, and I know you use a prong with Cricket. Just saying that it would REALLY suck to spend all that money, and then not even be able to use the KPA certification on your resume.
But if it's really what you want to do then I say go for it!!
(I could never be KPA cause I'd probably fail all the exams for saying "ah ah" too much
I just can't seem to get that out of my training vocab, nor do I think I need to in every instance)