Keeping them alive: Well i use this stuff called gut load, you can buy it at most pet stores, it seems to work very well for me.
Feeding them: gut load, carrots, kale, collard greens.
Housing:Kricket Keeper
Purchase: I get about 1 dozen every week, i wouldnt recomend geting any more than two dozen though.
Hideouts: Well the only thing i use as hide outs are egg cartons

O and do you like your bearded dragon i have one too.