You've been given the same opinion from several experienced growers, yet you dismiss all of them. Why ask for help?
I guess that old saying "you can lead them to water........" applies.
Good luck to you my friend.
I also suggest starting with photos. If you make any mistakes (and you will) it will adversely affect the autos..........they have a pre-determined life, and mistakes slow or even stop growth. Should you use photos and make any mistakes, you have time to correct them.
The vs4000 is too much for a 2x4 tent. You need approximately 240 watts. the vs2000 would be ideal for your tent........both size wise and watts. The vs3000 is good as well if you want to increase the wattage.
Totally disagree. Coco should never, ever dry out........it's drain to waste hydroponics and should be fed at least once a day. The OP's plants are nearly 5 weeks from sprout in 2 gallon fabric pots........roots searching for food is a non issue. The fabric pots encourage new roots by air...
You should be feeding at least once a day to substantial run off. If you do that you should never have to flush because of high EC run off.
Never give plain water.
Try just using the Micro and the Bloom..........I use 3ml micro and 4.5ml Bloom with tap water.......I like to keep my ppm's around...
Reduce the light hours to 18/6. I always liked to give my plants a rest.......that could be your drooping problem. My plants usually droop towards the end of their day and perk right up after they rest.
What is your medium?
Your light is 200 watts.......it'll be less than adequate for a 4x4 tent. For maximum yield you need double that at least.
A 4x4 tent is perfect for 4 plants.........one more plant isn't going to affect the smell any more than 3.
Your fan size is fine.
Another "paper towel germination problem" thread.
Just plant the seeds or use rapid rooters.
I have nearly 100% germination rate within 3-4 days using rapid rooters.
I wet them, place the seed in the hole, and put them in a drawer.........simple.
If you do grow outside, you need to wait until there's at least 14 hours of light per day. Currently it's only 12 hours.........sunrise is 7:40 and sunset is 7:38.