Depends, do you want to raise dubias? It would be the cheapest way, just get a decent sized opaque storage bin, I don't usually go below a 55 quart in the beginning. And then create airflow, heat, get your egg crates and gutload and your fruits and veggies. Pretty easy. I can go way more detailed if you want of how I take care of mine.
Silkworms never do well in cups. If you don't plan on raising them a small shoebox storage container will do just fine as a growing container, (I have my own mulberry trees to feed the leaves during the warmer seasons), make sure they have good airflow and gutter guard usually make cleaning them easier. But I just do paper towels on the bottom. But then again I breed mine to get the strongest genes in mine. So if some of mine die for some weird reason they were not meant to live because of poor genes. I have very few die offs anymore and still clean them about every other day. You wouldn't believe how much a bigger container can make healthier worms.
Butter worms are easy care, you keep them in the fridge and then take them out about 24 hours before hand if you want to try gutloading them. You can't raise them, they all have been radiated before being brought into the US.
As far as crickets the same amount of crickets as you have dubias, crickets will need 2 times the room to be healthy and happy, and 2 times the air flow. What a lot of people don't realize is cannibalism in cricket colonies has a lot to do with space and territory.
Depending on whether you have some extra space, stick insects are super easy if you get a low maintenance species.
