The time for showing sex is diffrent from plant to plant. Mine showed sex at 10 weeks of age from the day planted with about 5 days of 12/12. You can force them to flower early though. Just turn the lights down to 12/12. As for trying to suspend the growing for a short time, I'm not sure. I havent had to do that before. I think taking the light away would just make it stretch. And might trigger flowering. But if turned back to full light after a while it should convert back. But I'm not sure about the rate of growth. I'm sure it whould slow down a bit though.
You can't "stop" the growth for 2 weeks.
You could slow it down but if would make for a sickly plant throughout the rest of it's life.
My suggestion: if you can't move them safely, toss 'em and start over after you move.