I usually keep a Mother around long enough for a few cycles of clones. (4-6)

Other than topping for the next Mother, I try to cut all my clones from the bottom of the plant, so when I'm done, she's lollipopped, and ready for flower.

 I always figured the Bonsais you buy are expensive, because they're a helluva lotta work. Didn't translate to weed well for me.