We buy crickets 1000 at a time (we have two adult beardies) and just keep them in a rubbermaid tub in the guest bathroom. No lid - they can't jump straight up so can't get out. My brilliant husband drilled holes in the sides the size of the tubes that come with cricket keepers, and we use those tubes in addition to the egg crate that the crickets come with. So when it's cricket time, we just shake a tube-full of crickets into a plastic cup and sprinkle them with calcium, and tilt the cup slightly so our babies can pick the crickets off one at a time.
Here's our tub:
I make my own cricket chow - equal parts kitten chow, oatmeal, and milk powder with a handful of beardie bites, ground to powder in a food processor. Our vet gave us great advice - to wait until after dark to put the fresh veggies in. Crickets are nocturnal, so if the veggies are fresh when they're looking for food they'll get more benefit from them. And I've found that if I chop the greens very finely, there's less waste. Crickets drag the veggies all over the bin, so if they're cut finely, they only steal a tiny piece instead of taking a big one and depriving the others. As for water, a couple of spoonfuls of cricket gel with calcium lasts a couple of days.
You have to make sure the crickets are in a place where there won't be any fumes. Crickets are very sensitive to fumes and smells, so hair spray, air freshener, cleaning products and the like will kill them - that's why ours are in the guest bathroom and not ours. Also, if you clean the dead ones out (I just use a plastic spoon) every day or two there's no smell.
I bet I spend less than 10 minutes a day on cricket maintenance.