I had some for a couple years. They were kind of a pain, and I ended up letting them die. One big problem I had was keeping them in. At 1st I had an aquarium which wasn't big enough. So I got a big rubber tote and made a top out of plywood that I buggied to the tote with was tight. Then I cut a small window and put plexi-glass with latches on it. This allowed me to monitor the beetles without opening the top everytime. Plus I needed to water the beetles every couple of days, so it was easy access. I made a couple small holes for the cords from the heat rocks inside. I thought it was a pretty good setup, but they always found ways out. They would climb up the cord and have access to the top. If not the cord, then they seemed to find a way to reach the top either by the sides or the rack inside. And once they made it to the top, they could squeeze through any crack or chew through something to make one.
The other thing to think about is that you need to have it temperature controlled. I would love to have had mine in my barn but the temperature flucuated too much. So I put it in my garage which worked, but then I had to deal with a few that got out and some stink that they had. Once they were in the garage a few found there way into the house, which wasn't good!
Also, make sure you have a steady supply of food, because those beetles reproduce really quick. I started off with 100 and in a short time had thousands.
But they sure do a great job cleaning skulls! Just be prepared..