Also on the topic of this setup, you mentioned you're doing this in your basement, have you looked into what type of lighting you would use?

And with growbed depth for in ground veg, from what I have read you want 12 inches, for on top of ground veg I read that 8 inches is the minimum safe goal, this said when I started growing my tomatoes, they started in about 3-4 inches and now in the new system maybe 6 inches if I'm lucky, and have still grown fine, The numbers are like guidelines, if you can follow them great, but if your a little short and a gambling man, give it a shot.