Time Constrained Grow

I started some two plants 12 days ago (I am 8 days into vegging). I just had work setup a business trip October 6th so I would like to have the plants harvested before then.

• Leaving plants growing while away is not an option. Nobody knows about the grow and I want to keep it that way. I will be gone a week.
• Curing is not a problem as I plan to dry them completely for BHO.
• Putting them outside is not an option as weather is below freezing at that point.
• I know yield will suffer.

I was thinking vegging for 10 more days and flipping to flower. One plant has 60 day flower and the other 70 days.

Will I get something half decent by my October 6th deadline?

Leave lights on 24/7 until then. But even at 18/6 you should get something. Keep it simple. Easy on the nutrients. No screwup.