I had no issues getting the beetles to lay eggs, which hatched, and the teeny worms would grow to "tiny worm" stage, but no further. I've been told I needed more heat.
I bought my wheat bran at the feed store, for about $6 or so, I got 40+ lbs. Much better than the health food stores!
I hate crickets!! I accidentally had crickets breeding in a tank with dirt substrate once though. So if I can accidentally have baby crickets everywhere, it can't be that hard. I'm sure if I had fed them, they would have grown up. I just hate them, the adults chirp, and they all stink, and escape, and are just nasty.
I've been told by a lot of folks that roachs are a better bet, but most roachs can't be shipping into Florida, so I won't know!