I used to farm crickets when I was breeding Old World Chameleons.
One thing I need to warn you of is the noise, the smell, and the cost. Crickets will cannibalize each other readily if there is not ample food and water available. You will have multiple escapes, and the males will sing constantly every night. Cricket feces exudes an odor in large numbers that cannot be described. Their food is pretty easy, just about anything, but it quickly goes to rot even with the best husbandry practices in place.
For a home hobbyist, I would recommend one of the many cricket delivery subscriptions you can get if you need that large of an amount.