Man 4 of them would be nuts.
You have higher ceiling than my 5' tall main chamber.
So yours could grow much taller.
You could also use bigger pots.
Both these things would lead you to
bigger fruits!
Whenever you want to start just hit me up via pm or in any thread :)
You'll want to plan ahead
25 gallon is the biggest plastic pots go.
http://www.zenhydro.com/gro-pro-pre...gle_shopping&gclid=CIGt6dGk-9ICFd1WDQod31UECA
That would give you the solid anchor points for tie downs. Yet a huge soil volume to accommodate a ridiculous root mass :) more roots bigger fruits. Pack them roots in there.
There are
smart pots in larger sizes but they aren't as good for the training tie downs.
With those big pots you will have to find drip pans for each one so you never have to move them beasts.