Hello Jeff. I chose to begin with mealworms after researching other species (ants, termites, locusts, cockroaches) for a few different reasons. For starters, they appear to be fairly simple to maintain. Darkling beetles do not seem to be as big of a pest threat, should they happen to break loose from their housing. Meal worms are easy to come by, as they are already a standard food for various pets and livestock. I was able to find MUCH more information on raising mealworms than any other species.
I must apologize for delay in response to your query. I only just noticed the notification and am new to online forums. -Michael