I used to keep them when I lived with my parents and I looked after the school ones during the holidays when I worked in a first school. I took 3 home and returned 56 to the school as they had breed so much.
When i kept them I housed them in a 3 foot fish tank and they lived and breed well in it which is what I'm going to do with my Goldies tank which I recently cracked the base on so I can't keep the fish in there now. I've just got to find somewhere to get the eggs rom now and somewhere to put the tank.
So other than a big fish tank I can't think of anythingelse as I've never had them in anything else myself.
What type of stick insects do you have as I've only ever had the Indian stick insects.
You could convert a standard aquarium with a mesh screen top for that easily. No need to buy specific kit, even the small reptile and insect vivs are horribly expensive. Take a look at the bottom of the page here, a lot of mesh lids will work and you just put a standard aquarium on its end, there no water weight to worry about.Just silicone in a small perspex lip at the bottom edge to stop the substrate coming out, job done.
Some stick insects are slightly toxic to eat as adults, depends what they have been eating to a degree, but in truth I dont know about the eggs, they will be a rich source of protein, but I dont know about any trace enzymes, protiens or other substances in them that cause nutrient blocking and related toxicity. My thai water dragons used to eat the indian stick insects though, so they cant be that dangerous. Probably wouldnt use them as a major dietary component.
Probably one of those things, its bad to use almost any single type a food a lot. People sell them as feeders because of getting round the ebay rules,eg livefoods yes, pets no in the post, but most people prefer feeder insects that can be better gut loaded with a less specialist diet. They wouldnt usually be regarded as a feeder item as eggs or adults. I'd be suprised if they killed a fish outright on a small amount though.