Cockroaches and crickets were mainly food for the spiders. We don't get tarantulas native over here so there is a massive market for them, same with scorpions. I don't have many pics as I packed up spiders about 6 years ago but a couple of my old bits...Tarantulas are native to North Texas. I capture them in my yard and garage, so my dog doesn't kill them. I take them out to a big ranch near me, and release them. If the opportunity arises, I show them to the kids in the neighborhood before I take them out and release them. They are very handsome critters. I never felt a desire to keep any as pets.
I have to wonder, are you being serious? Cockroaches? Crickets? 15,000 spiders?
Got some pictures?
CD