Well I work for a dragon breeder, and I see how everything works. your best bet would be to keep him in a small tank, or rubbermaid tub. You would then need a heat light, a 50 watt halogen bulb works great. Than you need a UVB light. Then your set for heating and lighting. Next all you really need is some children's play sand, and a piece of slate. Thats it! Most people like to decorate and get a HUGE breeder tank for such a tiny animal, when really that will stress them out. Just like BP's.

20 crickets sounds alright, what you should do is feed 5 at a time for 10 minutes, or until he stops eating. Usually, what we do is have a cup of mealworms we top up everyday, and give them their greens at night when the lights go off.

Feel free to send me a PM if you have anymore questions.
Good luck!