Most of my former colony was very easy to hold but there was a couple that were very active and hard to hold, but eventually they started to calm down. For a colony a overall good sex ratio would be 1:3 through out the colony. If I were to start a small colony again I would buy only high quality juveniles. I kept mine anywhere from small kritter keepers to 10g tank to screen cages to a rack setup. You can pay anywhere from 25$ to 600$. For very nice geckos check out Kevin Dunne and Anthony Caponetto.