Are you growing for an ornamental purpose, or to smoke?
No, IMHO, not a good idea. You'll likely want to remove as much of the bud as possible to convince her it's spring and so she doesn't fight this sudden and dramatic change (and root tampering) with residual fall (flowering) hormones. As I don't do it that way on purpose, you're welcome to try tho, lol. :thumbsup:
The quantity of new shoots on a re-veg varies, but saying you'll get a shitload is fair. Those are cloneable.

As far as bonsai training for the growing shoots, the more you trim, the shorter they tend to grow and the more compact the results. With a sativa dom, you may get away with it. But on a squat indica it may restrict secondary growth a bit much.