You could certainly make a living selling bugs, I have in the past and a good friend of mine sells mantids as a hobby he has another job making really good money but he makes enough weekly on mantids that I could live on, though I live on the super inexpensive, like $5 a week on food lol. Electricity is my biggest cost and Im working on that, my buddy just built a huge solar grid Im soo jealous lol. Selling feeder insects online has really been booming over the past few years, even things like roaches and other things that people are usually uncomfortable with have increased alot over the past few years. I would look into turkistan and lobster roaches, Ive bred many different breeds of roaches and these two are the stand outs for sure turkistans are great cause they cant climb and only the males fly and lobsters are good cause they reproduce like nothing else. Crickets are good cause in general there the most popular feeder, but they are by far the nastiest also. Flys like houseflies and greenbottleflies are great there easy to raise in large numbers and are in high demand because of the lack of breeders. Goodluck with whatever you do and dont be afraid to ask questions.