Buffalo Beetle larvae, aka "mini mealworms", are easy to raise and make good cleaning crew for roach bins. The beetles can be kept in a plastic shoebox with oatmeal or oat bran bedding and a hunk of styrofoam for nesting. Larvae are smaller than that of Tenebrio molitor (mealworms found in most petstores) and are darker in color. Good for smaller species of spider like jumping or velvet spiders or smaller tarantulas. These do have a smell but it's only noticeable when you open the container.
Peanut beetle larvae make GREAT jumping spider feeders. They're smaller than mealworms, move more, can't climb smooth surfaces, and have much smaller mandibles than mealworms. This makes them safer for your spiders. I leave them in a feeding dish with smooth walls and don't worry about them getting out/into bedding or hurting the spiders. They produce well and seem to do best with neglect. While most care guides recommend leaving the lid off, since we're in the desert I have found that using bran (NOT oatmeal) and a handful of peanuts, and keeping the lid closed, help maintain humidity levels that the beetles prefer. I drop a baby carrot or potato slice in once a week and they do great. Larvae start small enough to feed anything eating hydei fruit flies, and 2-4 large larvae can feed a mature P. regius (regal jumping spider). Starting a colony will probably take 2-3 months if you start with one cup of 10-ish, without feeding from said colony until then. These have a very mild smell that, when compared to the buffalo beetle colony, is almost pleasant- and like the buffalo beetles, the smell is only noticeable if you get close to it with the lid off and sniff it.
DO NOT feed adult peanut beetles to anything- they give off a bitter chemical as an aversive.
Red runners are easy to keep. They generally can't climb smooth surfaces so do well in a large plastic bin with litter and egg crate at the bottom, and a line of vaseline at the top. Nymphs are small enough to use to feed i4 regal jumpers, and adults make great feeders for tarantulas and reptiles. The males can fly for short distances (maybe a foot or so) and may flap around when you go to do bin maintenance, so use a tall container to keep them.
These reproduce quickly and depending on the rain/humidity, may infest if they escape. Best if kept in an outdoor building not attached to your house.
MAY consider trades for some tarantula or jumper species (jumpers: P. basalis, P. fartilis, P. carneus, or P. apacheanus) or a male blizzard, peppermint, butter, or caramel Tessera corn snake.