I built a terrarium 18" tall, 24" long, 18" wide - out of window pane glass, spare plywood bottom and plastic liner for bottom - epoxy glued glasss, wood scraps to hold glass sides onto plywood base, wood frame and window screen top. Costs were about $25.
Bought dermestic beetles for $35 delivered (100+ bugs). They reproduce. I just keep one section of the terrarium dry with Gravy Train dog food, styrofoam blocks and wood shavings for reproduction habitat and the rest for food (pork and steak bone scraps from dinner) and a paper towel I partially soak with water to supply water to the little buggers. Been doing this for about 3 weeks now. I'm getting more bugs - they're reproducing! I have an old skull I started to boil in there, too. They'll clean off all the meat and leave me with a nice skull. I plan on a European mount this fall and will process for a neighbor or two, also.
Local folks charge $100+ for a European mount. I'll do my own for a lot less. I keep it in the basement where it is 73 degrees F. Just about the perfect temp for them (they can fly at temps higher than 80 degrees or so. I also keep a glass top (old storm window) across most of the top of the screen (not all as they need to breathe) to keep the smell (hardly any) contained.
When the bugs have done their stuff I'll just dip a while in diluted peroxide solution to kill off any eggs and I'll be set.
Google dermestid beetles for more info and where you can buy them. I bought from [email protected]
He has info on a website, too.