You were asking about mealworms in another thread.
Those and soldier fly larvae are both worth it financially and time wise. Neither require expensive heating or setup or significant time.
If you are allergic to roaches, then those are out, but if you weren't, lobster roaches are worth it also- they also do not require heat. And for feeding a single lizard would not require a lot of expense of fancy housing. They are unfortunately not so desirable to keep in one's house- they are great climbers and because they do well without extra heat, although they do not infest they can kind of loiter around for months when some get loose.
I breed lobsters, dubia, hissers, green banana roaches, and a giant hybrid species of roach, mealworms and superworms and in the summers I have a soldier fly ranch. Also house crickets and our local big black field crickets. Crickets are a lot of bother compared to everything else.