1. 4 lights (using diy leds)
2. Diy
3. 24 000 btu will be way enough
4. Dehumidifier will depends on your biomass. My ladies are drinking A LOT. They use around 0.4 liters/hour each, so just to calculate 0.4 x nb of plants x 12 hours. Divide your dehu by the pints /24 and divide by 12 hours less a little bit since your ac will remove some moisture. I have 12.77 pints/plant capacity and still not enough to get what I would love to...
5. bottled. I already saw issues with burner. Weird leaves, weird growth, etc.
6. I love the Sensi thermostat, fully programmable.
7. 5376g.