With a stash hidden in the home you live in your asking to get fuked,you gotta realize that hiding things in out of the way places like attic spaces & fake plumbing will be used agaiunst you in court to show intent.
Every action you make to cover your tracks will come back to haunt you durring trial & make your lawyers job more difficult,if your brave or foolish enough to keep stash in the home you live in your best bet is to get a safe & bolt it to the floor,then keep the shit in there,this way when the nazi's boot your shit in it's in a secure location that can be used to your defense if the subject of children comming in contact with a controled substance is attempted to be used against you,plus it takes away one more aspect of the conspiricy picture that all prosecutors try to paint.
Ive been raided & im here to tell you 1st hand, the the methods of hiding stash described in this thread will not help you in most cases,when they tore my house up it looked like a tornado had went through the joint,they even got up in my attic with lights & lawn rakes to turn over every last peice of insulation looking for cash or weed.
Especially when your talking about pounds,i dont care how you hide it a dog will be brought in & alert to the scent,just by you accessing the stash daily to get the customers order you'll be spreading the scent like a trail of popcorn.Dont be cheap or lazy with security,cops count on our unwillingness to create extra work to access the stash,they know its close by at all times.
The only fool proof way is to install an incenerator in the basement or kitchen, then keep the stash in it but you'll need a few minutes time to incenerate,buying the time needed requires putting security doors on the home with interior bracing to slow them down, as well as bars on the windows that are bolted through the wall into contact plates on the other side.