You can buy a cheap box of no brand bran flakes and put them in a 15 qt tub. Put all those pupae in there and they will turn into beetles which will lay eggs. Put a hundred mealworms in there and in 2 months you will have a never ending free source of mealworms. Just add more bran every couple of months and add a carrot or potato slice for moisture every week. If you keep them in a basement it is just like keeping them in a refrigerator and nothing will happen. They need to be kept at room temperature to evolve.