Hey Wayne I wouldn't be worried at all if they escape. I understand why FL legislature permits shipping and keeping of certain roaches...but on the other hand there are so many native lizards that would eat them in your neck of the woods it's actually rather silly. I was near the gulf last year in march and one night I was having dinner outside, on the restaraunt patio. There must have been 20 or more brown anoles within arms reach around our table, barely skittish and snatching up every bug in sight.
Nice pics of the colony btw. Good for reference for those wanting to jump into roaches as feeders.
I built my roach box out of a large rubbermaid type tote. I think it was 45 gallons or so. 2 runs of 3 inch flexwatt heat tape on the back of box, roach flats for structure and containers to keep food and water crystals. I used commercial cricket feed mixed with bee pollen granules for constant dry feed. And occasional fruits, papaya was eaten with a fervor.
I learned most of my roach knowledge from a guy who is no longer in the business. He did a fantastic job though, had some very advanced ideas and products. He had special way of making food/water dishes. They were made of plastic, but a coating of a gritty sand-like material covered them, making it easy for even the tiniest of nymphs to climb up and feed.