Leave it up to the trichomes, I say. If the trichomes are all cloudy, harvest. If they aren't, don't harvest.
If it is done and you harvest, trim all the fan leaves and hang it in a temperature controlled room.
60°F & 60% relative humidity.
If it isn't ready, there are ways to keep the pots wet. Like bottom watering and auto wicks. There are timers you can buy for lights and electronics to keep their current cycles going. Not sure how to keep water in a humidifier, or empty a dehumidifier, though.
But, if you give it 3 more weeks, I'm pretty sure it will be done.
I hope this helps.
Happy harvesting!