Hand watering 13 plants in coco will be a pain in the ass. I got up to 8 and hated it so switched back to DWC. Also I think you may struggle to cool all those daisy chained lights with a 400cfm fan. I think with that one huge tent you could harvest just as much bud with 1600w of lighting and 4 DWC buckets. Plus if LEO ever come a calling 4 plants and 1 tent looks a lot better than 13 plants and 2 tents. 0.02
Oh I don't plan on running all 13 at one time thats just what I have on order. I was gonna run 4 and 4. Believe me I know its a pain in the ass I currently have 13 photos going at the moment. The larger tent will have the autopots so I would only have to deal with hand watering for 4. I thought about going to dwc but it would be hard to control the temps during the summer. I ran a rdwc last year and the temps got me towards the end.
Maybe I'll skip the 4 handwatered plants and try a single dwc under the 600 watt light and if it works out well then maybe add more, I dunno. Still got a couple weeks before I place my order for my nutes and equipment.