You need to know that the adults will spawn about once a month. As I said, they can have anywhere from a few fry survive to hundreds. You'd need to have a large enough tank to accomodate them. You'd have to have grow out tanks for the fry unless you kept them in a huge main tank.
Kribs spawn on their own. You don't need to do anything to provoke them into it. They are spawning machines.
I started feeling like I had a fry factory, rather than a fish tank, so I brought all of mine, adults included, to the lfs and moved on to other things.
I doubt your lfs will take as many as your adults will provide.