You are talking about the Brown crickets people buy to feed reptiles, right?
I have been raising my own for a few years now and at a temp of around 80F they complete their life cycle in about three months from hatching to death.
The sound of chirping crickets is a year round feature of our home.
EDIT: Oops, I missed the once they start chirping part. that lasts about the last 3 weeks of their life per container. They die shortly, within days, after breeding and laying.